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Am I still contagious?

Whether you are still contagious depends on the illness and on the day your symptoms started: flu can be passed on for five to seven days after you fall ill, according to the CDC; norovirus for two full days after the last vomiting or diarrhoea, by the NHS rule.

6illnesses
6national guidance sets
155dated official sources
Contagious periods by illness:Flu (influenza)COVID-19RSVNorovirus / stomach bugStrep throat / scarlet feverA common cold

Medically reviewed by Dr. Chrysoula Liakou, MD, PhDFigures checked against the sources on 22 Sep 2026Page updated 24 Sep 2026

On this pageCheck your datesRead the full guide for your illnessHow the calculator works out your datesFive rules of thumb that hold across the six illnessesHow long each illness is contagious: the headline figuresWhy the official rules differ from country to countryGoing back to work or school: what the rules sayWhen 'am I still contagious?' becomes 'should I see a doctor?'Questions people askThe data behind this toolAbout this pageSources

Read the full guide for your illness

Day-by-day contagious period, the rules in six countries and the questions people ask, per illness.

How long is flu contagious?Flu (influenza)How long is COVID contagious?COVID-19How long is RSV contagious?RSVHow long is norovirus contagious?Norovirus / stomach bugHow long are strep throat and scarlet fever contagious?Strep throat / scarlet feverHow long is a cold contagious?A common cold

The calculator counts from your date under the guidance of the country you pick.

It does not diagnose you. You choose the illness; if you are unsure what you have, ask a doctor, not a calculator. Each illness has its own guide with the day-by-day figures, the work and school rules and the six-country comparison; the pattern that runs through all six is below.

How the calculator works out your dates

Day 0 is the first day you had symptoms. Every figure counts from it, because the authorities do: the CDC's flu window runs from a day before symptoms to five to seven days after.

You get up to three dates: the days you are most likely to pass it on, where an authority names them; the day the risk has usually passed; and the day you can go back under your country's rule. The second is a range because that is what the sources publish: the UKHSA says most people with COVID-19 are no longer infectious after five days, some for up to ten.

Some rules are not dates. The NHS says stay at home while you have a high temperature or do not feel well enough for your normal activities; the CDC asks for 24 hours of improving symptoms with no fever and no fever-reducing medicine. The calculator cannot take your temperature, so it asks whether you still have one and shows the rule. Norovirus counts from your last vomiting or diarrhoea, scarlet fever from your first antibiotic dose.

Five rules of thumb that hold across the six illnesses

  • Flu, COVID-19 and colds spread before you feel ill: the CDC puts flu at about a day before symptoms, and estimates over half of COVID-19 transmission comes from people without symptoms at the time. For a cold the NHS says a few days, no number.
  • For respiratory illnesses, fever decides the return. NHS: stay at home while you have a high temperature or do not feel well enough for your normal activities. CDC: 24 hours of improving symptoms, no fever, no fever-reducing medicine, then five days of precautions.
  • Norovirus counts from the end. NHS: two full days with no vomiting or diarrhoea before work, school, nursery, hospital or care-home visits. The CDC says you can still spread it for two weeks or more, so keep washing your hands with soap.
  • Antibiotics end the contagious period for strep throat and scarlet fever only. NHS: 24 hours after the first dose, against two to three weeks untreated. They do nothing for viruses.
  • A cough can outlast the contagious period: the CDC finds flu virus for up to five to seven days, while the WHO says the cough can last two weeks or more. A cold is the exception: the NHS counts it as infectious until all symptoms have gone.

How long each illness is contagious: the headline figures

Flu: the NHS puts the risk to others in the first five days after infection; the CDC says about a day before symptoms to five to seven days after, peaking in the first three days. See the flu page.

COVID-19: the UKHSA says most people are no longer infectious after five days, some for up to ten. NHS rule: five days at home after a positive test, and ten days avoiding anyone at higher risk. See the COVID-19 page.

RSV: the NHS gives no contagious period, only that it often gets better in one or two weeks; the CDC says three to eight days, four weeks or longer for some babies and people with weakened immunity. See the RSV page.

Norovirus, the stomach bug: about two days of illness, the NHS says, then two full days with no vomiting or diarrhoea before going back; the CDC says you can still spread it for two weeks or more. See the norovirus page.

Strep throat and scarlet fever: contagious until 24 hours after the first antibiotic dose, the NHS says; two to three weeks untreated. See the strep throat and scarlet fever page.

A cold: infectious until all your symptoms have gone, the NHS says, usually one to two weeks, longer in babies and young children. See the cold page.

Why the official rules differ from country to country

The virus is the same everywhere; the rules are not, because each authority answers a different question. On flu, the CDC and the Dutch RIVM agree: about a day before symptoms to five to seven days after. Yet the NHS says stay home while you have a high temperature; Germany's BZgA asks for three to five days at home and until symptoms improve; Italy's ISS says until recovered, about seven days; the RIVM applies no formal exclusion because the risk has largely dropped by day 5; and France's Ameli publishes no return rule.

Part of the gap is what a laboratory measures versus what a rule needs: Germany's RKI says COVID-19 virus traces are detectable for about eleven days while contagiousness lasts about five. Part is priorities. For norovirus the NHS keeps everyone off for two days; Italy's ISS keeps only food handlers off, for three; the RIVM keeps only food and care workers off, for one, and says excluding schoolchildren during an outbreak is not justified.

Going back to work or school: what the rules say

The health rule comes first, and it depends on where you live: pick your country in the calculator and it applies that country's rule; each illness guide spells the rules out and compares them. In the UK, the UKHSA's exclusion list for schools and nurseries keeps the same clocks as the NHS advice for flu, norovirus and scarlet fever, and for other respiratory infections keeps a child off only with more than mild symptoms, such as a high temperature. Germany's BZgA asks for three to five days at home with flu; Italy's ISS says stay away until recovered; the Dutch RIVM applies no formal exclusion and notes the risk drops sharply by day five; France and Spain publish no day count for adults.

If you work in the UK, the government's sick-leave guidance applies: off for seven days or less, you do not need a fit note, though your employer can ask you to confirm you were ill (self-certification). Off for more than seven days in a row, counting weekends, you need a fit note, and a doctor, or another professional the guidance lists, decides whether one is appropriate. The UKHSA's advice for respiratory symptoms: work from home if you can, and talk to your employer if you cannot. The German, French, Spanish, Italian and Dutch guides carry the sick-note practice of each country.

This is health guidance, not employment law; the page gives no legal advice. Employers and schools may set their own terms. The fit-note rule is UK guidance; in Ireland, check the rules that apply to you.

When 'am I still contagious?' becomes 'should I see a doctor?'

The answer is usually a date; it becomes a doctor's question when the illness is not behaving. Call 112 for severe difficulty breathing, sudden chest pain, coughing up or vomiting blood, collapse or a first seizure, a rash that does not fade under a glass, blue or grey lips, or a floppy child who will not wake. Short of that, the NHS pages share these signals for seeing a doctor:

  • worsening or not improving: after seven days with flu, ten with a cold, or a high temperature lasting five days or more with COVID-19
  • shortness of breath, or chest pain
  • you cannot keep fluids down, or dehydration does not improve with rehydration sachets
  • you are 65 or over (60 for COVID-19), pregnant, or have a long-term condition or a weakened immune system
  • a baby or child worries you, especially a baby under 12 months with vomiting or diarrhoea

Questions people ask

Am I still contagious if I don't have a fever?

You can be. The CDC's flu window runs to five to seven days after symptoms start with or without a temperature, and it notes that not everyone with flu gets a fever. A high temperature is the NHS's signal for staying at home, not proof of safety without one; the CDC follows 24 fever-free hours with five days of precautions.

How long after starting antibiotics am I no longer contagious?

For strep throat and scarlet fever, 24 hours after the first dose, the NHS says; the CDC's clinical guidance says 12 hours or longer of an appropriate antibiotic limits your ability to pass it on. For flu, COVID-19, RSV, norovirus and colds, antibiotics change nothing, because they only work on bacterial infections.

Can I go to work with a cold?

Yes, if you feel well enough: the NHS rule is stay home while you have a high temperature or do not feel well enough for your normal activities. But a cold is infectious until all your symptoms have gone, it says, usually one to two weeks, so keep away from anyone at higher risk until then.

How long should my child stay off school or nursery?

Under the UKHSA's exclusion list: flu, until they are better and no longer have a temperature; norovirus or any vomiting and diarrhoea, two days after it stopped; scarlet fever, 24 hours after antibiotics started; COVID-19, RSV and colds, only while there are more than mild symptoms, such as a high temperature. The NHS adds three days after a positive COVID-19 test for under-18s.

Am I still contagious after a negative test?

Not necessarily. The CDC says a negative COVID-19 test does not rule out infection, and that testing does not change how likely you are to spread a respiratory virus; the NHS counts its days from the positive test, not from a negative one.

Am I still contagious if I still have a cough?

With flu, usually not if the cough is all that remains: the CDC finds the virus for up to five to seven days, while the WHO says the cough can last two weeks or more. A cold is different: the NHS counts it as infectious until all symptoms have gone. A cough lasting more than three weeks needs a GP.

How long am I contagious before symptoms start?

Only some authorities say. The CDC gives about a day for flu, a day or two for RSV, and for COVID-19 puts the highest levels of live virus in the few days either side of the first symptoms. The NHS says a cold spreads from a few days before symptoms. Its norovirus and scarlet fever pages give no pre-symptom figure.

Am I still contagious after 5 days?

With COVID-19, probably not, but possibly: the UKHSA says most people are no longer infectious after five days, some for up to ten, so the NHS keeps you away from anyone at higher risk until day ten. With flu, the CDC says the virus can be found for five to seven days.

Which country's guidance should I pick in the calculator?

The country whose rules your workplace, school or nursery follows, usually the one you are in. 'International' is the English-language setting: NHS rules, with UKHSA and CDC figures where the NHS publishes none; there is no separate set for Ireland. Travelling? Check both countries; the same flu means three to five days at home in Germany and no rule in France.

Not sure what you have, or need advice for your situation?

Mobi Doctor connects you with a licensed EU-registered doctor over video, usually within 15 minutes, daily 7am–11pm CET.

See available timesCold and flu: what we treat

The data behind this tool

Every figure the calculator uses, per illness and guidance set, as an open file with the source and its date. Free to reuse with a link to this page (CC BY 4.0).

Download JSONDownload CSV

Cite as: Mobi Doctor, Contagious-period rules from six national health authorities, 24 Sep 2026.

About this page

Medically reviewed

Written by the Mobi Doctor medical content team. Every figure on this page is traced to a dated official source, listed under Sources. The six national guidance sets are kept separate: where an authority publishes nothing, the page says so instead of borrowing a neighbour's number. Each figure was checked independently against its source before publication.

Medically reviewed by Dr. Chrysoula Liakou, MD, PhD.

Found something out of date? Use the contact page and we will check it against the source. Contact us

Sources

All 155 sources, by authority

AIFA (Agenzia Italiana del Farmaco)

  1. Uso degli antivirali orali per COVID-19 — AIFA (Agenzia Italiana del Farmaco) (reviewed 22 Sep 2026)

ASPCAT (Generalitat de Catalunya)

  1. Exclusio escolar — ASPCAT (Generalitat de Catalunya) (reviewed 3 Dec 2025)

Ameli (Assurance Maladie)

  1. Reconnaitre la grippe — Ameli (Assurance Maladie) (reviewed 7 Oct 2025)
  2. Covid-19 : reconnaître la maladie et ses symptômes, adopter les bons gestes — Ameli (Assurance Maladie) (reviewed 22 Oct 2025)
  3. Isolement : duree, precautions, regles d'hygiene — Ameli (Assurance Maladie) (reviewed 10 Nov 2025)
  4. Reconnaitre la gastro-enterite — Ameli (Assurance Maladie) (reviewed 3 Jan 2025)
  5. Scarlatine : definition, symptomes, transmission — Ameli (Assurance Maladie) (reviewed 24 Mar 2025)
  6. Scarlatine : prevention — Ameli (Assurance Maladie) (reviewed 26 Mar 2025)
  7. Rhinopharyngite : symptomes — Ameli (Assurance Maladie) (reviewed 20 Dec 2024)
  8. Reconnaitre la bronchiolite — Ameli (Assurance Maladie) (reviewed 3 Jul 2026)
  9. Prévenir la rhinopharyngite de l'adulte — Ameli (Assurance Maladie) (reviewed 20 Dec 2024)
  10. Rhinopharyngite de l'adulte : que faire et quand consulter ? — Ameli (Assurance Maladie) (reviewed 5 Feb 2026)
  11. Rhinopharyngite de l'adulte : traitement médical — Ameli (Assurance Maladie) (reviewed 4 Feb 2026)
  12. Reconnaître la rhinopharyngite de l'enfant — Ameli (Assurance Maladie) (reviewed 4 Feb 2026)
  13. Prévenir la rhinopharyngite de l'enfant — Ameli (Assurance Maladie) (reviewed 4 Feb 2026)
  14. Que faire en cas de contact avec une personne malade du Covid-19 ? — Ameli (Assurance Maladie) (reviewed 18 Mar 2025)
  15. Traitement de la grippe — Ameli (Assurance Maladie) (reviewed 10 Sep 2025)
  16. Prévenir la grippe : comprendre la vaccination et les gestes barrières — Ameli (Assurance Maladie) (reviewed 27 Mar 2026)
  17. Grippe : que faire et quand consulter ? — Ameli (Assurance Maladie) (reviewed 10 Sep 2025)
  18. Grippe : virus en cause, transmission et épidémie — Ameli (Assurance Maladie) (reviewed 15 Oct 2025)
  19. Symptômes et causes de la gastro-entérite chez l'enfant — Ameli (Assurance Maladie) (reviewed 3 Jan 2025)
  20. Prévenir la gastro-entérite chez l'enfant et la vaccination des nourrissons — Ameli (Assurance Maladie) (reviewed 29 May 2026)
  21. Prévenir la gastro-entérite de l'adulte — Ameli (Assurance Maladie) (reviewed 2 Jan 2025)
  22. Gastro-entérite de l'adulte : les bons réflexes, que faire — Ameli (Assurance Maladie) (reviewed 2 Jan 2025)
  23. Gastro-entérite de l'adulte : consultation et traitement — Ameli (Assurance Maladie) (reviewed 3 Jan 2025)
  24. Bronchiolite : les bons réflexes — Ameli (Assurance Maladie) (reviewed 3 Jul 2026)
  25. Prévenir la survenue de la bronchiolite — Ameli (Assurance Maladie) (reviewed 25 Aug 2026)
  26. Bronchiolite : traitement — Ameli (Assurance Maladie) (reviewed 3 Jul 2026)
  27. Scarlatine : diagnostic, traitement et évolution — Ameli (Assurance Maladie) (reviewed 26 Mar 2025)
  28. Scarlatine : que faire et dans quels cas consulter ? — Ameli (Assurance Maladie) (reviewed 26 Mar 2025)
  29. Angine : traitement — Ameli (Assurance Maladie) (reviewed 23 Apr 2025)
  30. Angine : les mesures pour limiter la contagion — Ameli (Assurance Maladie) (reviewed 8 Dec 2023)
  31. Arrêt maladie : les démarches du salarié — Ameli (Assurance Maladie) (reviewed 5 Aug 2026)

Arboportaal (ministerie van Sociale Zaken en Werkgelegenheid)

  1. Richtlijnen werkgever en werknemer bij ziekteverzuim — Arboportaal (ministerie van Sociale Zaken en Werkgelegenheid) (reviewed 18 Jun 2026)

Asociación Española de Pediatría (En Familia)

  1. Bronquiolitis — Asociación Española de Pediatría (En Familia) (reviewed 6 Nov 2019)
  2. Escarlatina — Asociación Española de Pediatría (En Familia) (reviewed 18 May 2019)

BZgA infektionsschutz.de

  1. Erregersteckbrief Grippe (Influenza) — BZgA infektionsschutz.de (reviewed 23 Apr 2018)
  2. Atemwegsinfektionen — BZgA infektionsschutz.de (reviewed 17 Mar 2025)
  3. Erregersteckbrief Coronavirus SARS-CoV-2 / COVID-19 — BZgA infektionsschutz.de (reviewed 1 May 2025)
  4. Erregersteckbrief Noroviren — BZgA infektionsschutz.de (reviewed 24 Apr 2018)
  5. Erregersteckbrief RSV (Respiratorisches Synzytial-Virus) — BZgA infektionsschutz.de (reviewed 1 May 2025)
  6. Erregersteckbrief Scharlach — BZgA infektionsschutz.de (reviewed 1 Mar 2024)

Bundesministerium für Arbeit und Soziales (BMAS)

  1. Keine Einschränkungen bei Lohnfortzahlung im Krankheitsfall (Pressemeldung) — Bundesministerium für Arbeit und Soziales (BMAS) (reviewed 9 Jan 2025)

CDC

  1. How Flu Spreads — CDC (reviewed 17 Sep 2024)
  2. Signs and Symptoms of Flu — CDC (reviewed 26 Aug 2024)
  3. Preventing Spread of Respiratory Viruses When You're Sick — CDC (reviewed 18 Aug 2025)
  4. Testing for COVID-19 — CDC (reviewed 10 Mar 2025)
  5. Testing and Respiratory Viruses — CDC (reviewed 18 Aug 2025)
  6. How RSV Spreads — CDC (reviewed 20 Feb 2026)
  7. How Norovirus Spreads — CDC (reviewed 24 Apr 2024)
  8. Clinical Guidance for Group A Streptococcal Pharyngitis — CDC (reviewed 18 Nov 2025)
  9. About Common Cold — CDC (reviewed 19 Feb 2026)
  10. Flu Treatment (antiviral drugs) — CDC (reviewed 2 Sep 2025)
  11. Flu Testing — CDC (reviewed 10 Mar 2026)
  12. About Norovirus — CDC (reviewed 24 Apr 2024)
  13. Preventing Norovirus — CDC (reviewed 13 Jan 2025)
  14. RSV Symptoms and Care — CDC (reviewed 20 Feb 2026)
  15. About Strep Throat — CDC (reviewed 15 Jan 2026)
  16. About Scarlet Fever — CDC (reviewed 10 Dec 2025)
  17. Preventing Group A Strep Infection — CDC (reviewed 12 Jan 2026)
  18. Testing for Group A Strep — CDC (reviewed 7 Aug 2025)
  19. How RSV Spreads — CDC (reviewed 20 Feb 2026)

CDC (archived page, archive.cdc.gov)

  1. Background for CDC's Updated Respiratory Virus Guidance — CDC (archived page, archive.cdc.gov) (reviewed 6 Jun 2025)

Canal Salut (Generalitat de Catalunya)

  1. Bronquiolitis — Canal Salut (Generalitat de Catalunya) (reviewed 15 Jan 2021)
  2. Norovirus — Canal Salut (Generalitat de Catalunya) (reviewed 28 Oct 2025)
  3. Escarlatina — Canal Salut (Generalitat de Catalunya) (reviewed 27 Apr 2023)
  4. Refredat — Canal Salut (Generalitat de Catalunya) (reviewed 14 Oct 2025)
  5. Grip: símptomes — Canal Salut (Generalitat de Catalunya) (reviewed 18 Dec 2024)
  6. Grip: transmissió — Canal Salut (Generalitat de Catalunya) (reviewed 18 Dec 2024)
  7. Grip: tractament — Canal Salut (Generalitat de Catalunya) (reviewed 18 Dec 2024)

Comunidad de Madrid

  1. Gripe — Comunidad de Madrid (reviewed 21 Sep 2026)
  2. Coronavirus — Comunidad de Madrid (reviewed 12 Jun 2026)
  3. COVID-19. Preguntas frecuentes — Comunidad de Madrid (reviewed 25 Mar 2022)

Comunidad de Madrid (Servicio Madrileño de Salud, Gerencia Asistencial de Atención Primaria)

  1. Baja laboral — Comunidad de Madrid (Servicio Madrileño de Salud, Gerencia Asistencial de Atención Primaria) (reviewed 10 Aug 2026)

ECDC

  1. Factsheet about seasonal influenza — ECDC (reviewed 12 Apr 2022)
  2. Questions and answers on COVID-19: Basic facts — ECDC (reviewed 12 Jun 2023)
  3. Facts about norovirus — ECDC (reviewed 26 Jun 2017)

EpiCentro / Istituto Superiore di Sanità

  1. Influenza — EpiCentro / Istituto Superiore di Sanità (reviewed 31 Oct 2025)
  2. Virus parainfluenzali e agenti del raffreddore — EpiCentro / Istituto Superiore di Sanità (reviewed 21 Sep 2026)
  3. Norovirus — EpiCentro / Istituto Superiore di Sanità (reviewed 15 Feb 2018)
  4. Virus parainfluenzali e agenti del raffreddore: precauzioni e trattamento — EpiCentro / Istituto Superiore di Sanità (reviewed 22 Sep 2026)
  5. Sindromi parainfluenzali — EpiCentro / Istituto Superiore di Sanità (reviewed 22 Sep 2026)
  6. COVID-19 (coronavirus) — EpiCentro / Istituto Superiore di Sanità (reviewed 22 Sep 2026)

EpiCentro / Istituto Superiore di Sanità (Bollettino Epidemiologico Nazionale)

  1. L'allontanamento dalla frequenza scolastica come misura di controllo delle malattie infettive. Revisione dell'evidenza — EpiCentro / Istituto Superiore di Sanità (Bollettino Epidemiologico Nazionale) (reviewed 1 Nov 2001)

GOV.UK (UK government)

  1. Taking sick leave — GOV.UK (UK government) (reviewed 9 Sep 2026)

Gobierno Vasco (Eusko Jaurlaritza) / Osakidetza

  1. Resfriado común: recomendaciones útiles en la infancia — Gobierno Vasco (Eusko Jaurlaritza) / Osakidetza (reviewed 25 Apr 2025)

Haut Conseil de la santé publique (HCSP)

  1. Survenue de maladies infectieuses dans une collectivité. Conduites à tenir — Haut Conseil de la santé publique (HCSP) (reviewed 28 Sep 2012)

INPS (Istituto Nazionale della Previdenza Sociale)

  1. Come funziona il certificato di malattia telematico (lavoratori privati e pubblici) — INPS (Istituto Nazionale della Previdenza Sociale) (reviewed 2024-03)

ISCIII (Centro Nacional de Epidemiología, SiVIRA)

  1. Vigilancia de Infección Respiratoria Aguda. Gripe, COVID-19 y VRS. Informe anual temporada 2023-24 — ISCIII (Centro Nacional de Epidemiología, SiVIRA) (reviewed 11 Feb 2025)

Institut Pasteur

  1. Grippe — Institut Pasteur (reviewed 15 Jan 2026)

Légifrance (arrêté interministériel, ministères chargés de la Santé et de l'Éducation)

  1. Arrêté du 3 mai 1989 relatif aux durées et conditions d'éviction en cas de maladies contagieuses dans les établissements d'enseignement — Légifrance (arrêté interministériel, ministères chargés de la Santé et de l'Éducation) (reviewed 3 May 1989)

Ministerio de Sanidad

  1. Gripe (enfermedades prevenibles, profesionales) — Ministerio de Sanidad (reviewed 22 Sep 2026)
  2. Preguntas y respuestas sobre la vacunación frente a la gripe. Información para la ciudadanía (octubre 2021) — Ministerio de Sanidad (reviewed 2021-10)
  3. Recomendaciones frente a infecciones respiratorias agudas — Ministerio de Sanidad (reviewed 3 Dec 2025)
  4. VRS - Virus Respiratorio Sincitial (enfermedades prevenibles, profesionales sanitarios) — Ministerio de Sanidad (reviewed 2024-08)

Ministerio de Sanidad (Centro de Coordinación de Alertas y Emergencias Sanitarias)

  1. Parámetros epidemiológicos de COVID-19 (Información científica-técnica, 13 de enero de 2022) — Ministerio de Sanidad (Centro de Coordinación de Alertas y Emergencias Sanitarias) (reviewed 13 Jan 2022)

Ministero della Salute

  1. Circolare n.4 del 13 marzo 1998 — Ministero della Salute (reviewed 13 Mar 1998)

Ministero della Salute (Circolare 11 agosto 2023), as published by Azienda USL Umbria 2

  1. Covid-19, cade l'obbligo di isolamento per i positivi — Ministero della Salute (Circolare 11 agosto 2023), as published by Azienda USL Umbria 2 (reviewed 26 Aug 2023)

NHS

  1. Flu — NHS (reviewed 3 Feb 2026)
  2. COVID-19 symptoms and what to do — NHS (reviewed 21 Mar 2023)
  3. Respiratory syncytial virus (RSV) — NHS (reviewed 5 Jul 2024)
  4. Norovirus (vomiting bug) — NHS (reviewed 31 Dec 2024)
  5. Scarlet fever — NHS (reviewed 23 Dec 2024)
  6. Common cold — NHS (reviewed 22 Mar 2024)
  7. Sore throat — NHS (reviewed 8 Apr 2024)
  8. Bronchiolitis — NHS (reviewed 19 Feb 2026)
  9. Treatments for COVID-19 — NHS (reviewed 21 Mar 2023)
  10. Strep A — NHS (reviewed 7 Jan 2026)

Osakidetza (Servicio Vasco de Salud)

  1. Recomendaciones útiles: resfriado común (adultos) — Osakidetza (Servicio Vasco de Salud) (reviewed 22 Sep 2026)

RIVM

  1. Influenza — RIVM (reviewed 18 Mar 2025)
  2. COVID-19 — RIVM (reviewed 18 Mar 2025)
  3. RSV-infectie — RIVM (reviewed 25 Nov 2025)
  4. Norovirus — RIVM (reviewed 8 Jan 2026)
  5. Groep A-streptokokkeninfectie — RIVM (reviewed 3 Jul 2026)
  6. Luchtweginfecties: adviezen bij klachten — RIVM (reviewed 30 Oct 2025)
  7. RS-virus — RIVM (reviewed 3 Sep 2026)
  8. Vragen en antwoorden griep — RIVM (reviewed 21 Sep 2026)
  9. COVID-19 (corona): besmettelijkheid, zelftest en adviezen — RIVM (reviewed 22 Sep 2026)
  10. Norovirus — RIVM (reviewed 22 Sep 2026)

Robert Koch-Institut

  1. RKI-Ratgeber Influenza (saisonal) — Robert Koch-Institut (reviewed 14 Jan 2026)
  2. RKI-Ratgeber COVID-19 — Robert Koch-Institut (reviewed 24 Aug 2026)
  3. RKI-Ratgeber RSV — Robert Koch-Institut (reviewed 10 Sep 2026)
  4. RKI-Ratgeber Noroviren — Robert Koch-Institut (reviewed 29 Nov 2019)
  5. RKI-Ratgeber Streptococcus pyogenes — Robert Koch-Institut (reviewed 1 Feb 2024)
  6. Häufig gestellte Fragen und Antworten zur Grippe (Influenza) — Robert Koch-Institut (reviewed 3 Dec 2025)

Robert Koch-Institut (Epidemiologisches Bulletin 1/2023)

  1. Empfehlungen für die Wiederzulassung zu Gemeinschaftseinrichtungen gemäß § 34 IfSG — Robert Koch-Institut (Epidemiologisches Bulletin 1/2023) (reviewed 5 Jan 2023)

SESCAM (Servicio de Salud de Castilla-La Mancha)

  1. Frente a la gripe, protégete: propagación y contagio — SESCAM (Servicio de Salud de Castilla-La Mancha) (reviewed 22 Sep 2026)

SIP (Società Italiana di Pediatria)

  1. Virus respiratorio sinciziale e bronchiolite, tutto quello che i genitori devono sapere — SIP (Società Italiana di Pediatria) (reviewed 19 Nov 2021)
  2. Scarlattina: incubazione, trasmissione e sintomi — SIP (Società Italiana di Pediatria) (reviewed 1 Sep 2020)
  3. Streptococco: ecco la guida della SIP — SIP (Società Italiana di Pediatria) (reviewed 24 May 2023)

Sacyl (Junta de Castilla y León, Consejería de Sanidad)

  1. Preguntas y respuestas sobre la gripe — Sacyl (Junta de Castilla y León, Consejería de Sanidad) (reviewed 30 Sep 2023)

Santé publique France

  1. COVID-19 : la maladie — Santé publique France (reviewed 15 Apr 2026)
  2. La grippe, une épidémie saisonnière — Santé publique France (reviewed 22 Apr 2019)
  3. Gastro-entérites aiguës : la maladie — Santé publique France (reviewed 17 Apr 2025)
  4. Bronchiolite : la maladie — Santé publique France (reviewed 17 Apr 2024)

Santé.fr (ministère chargé de la Santé)

  1. Tout savoir sur le Coronavirus Covid-19 — Santé.fr (ministère chargé de la Santé) (reviewed 6 Jul 2026)

Thuisarts.nl

  1. Ik heb griep — Thuisarts.nl (reviewed 10 Aug 2026)
  2. Mijn kind heeft roodvonk — Thuisarts.nl (reviewed 27 Jul 2026)
  3. Ik ben verkouden — Thuisarts.nl (reviewed 20 Feb 2026)
  4. Mijn kind is verkouden — Thuisarts.nl (reviewed 20 Feb 2026)
  5. Ik heb corona — Thuisarts.nl (reviewed 29 Jan 2024)
  6. Ik heb buikgriep, wat moet ik doen? — Thuisarts.nl (reviewed 14 Jul 2026)
  7. Mijn kind heeft misschien het RS-virus — Thuisarts.nl (reviewed 1 Jul 2025)
  8. Ik heb keelpijn — Thuisarts.nl (reviewed 25 Aug 2026)

UKHSA (gov.uk)

  1. People with symptoms of a respiratory infection including COVID-19 — UKHSA (gov.uk) (reviewed 10 Jun 2022)
  2. Public health exclusion periods in children and young people's settings — UKHSA (gov.uk) (reviewed 7 Sep 2026)

UWV

  1. Ziek, wat nu — UWV (reviewed 11 Sep 2026)

WHO

  1. Influenza (seasonal) fact sheet — WHO (reviewed 28 Feb 2025)

gesund.bund.de (Bundesministerium für Gesundheit)

  1. Erkaeltung — gesund.bund.de (Bundesministerium für Gesundheit) (reviewed 28 Nov 2024)
  2. Erkältung — gesund.bund.de (Bundesministerium für Gesundheit) (reviewed 28 Nov 2024)
  3. COVID-19 — gesund.bund.de (Bundesministerium für Gesundheit) (reviewed 12 Jan 2024)
  4. Grippe (Influenza) — gesund.bund.de (Bundesministerium für Gesundheit) (reviewed 29 Nov 2024)
  5. Norovirus-Infektion — gesund.bund.de (Bundesministerium für Gesundheit) (reviewed 27 Jun 2025)
  6. Scharlach — gesund.bund.de (Bundesministerium für Gesundheit) (reviewed 26 Aug 2024)
  7. Die elektronische Arbeitsunfähigkeitsbescheinigung (eAU) — gesund.bund.de (Bundesministerium für Gesundheit) (reviewed 13 Nov 2024)

This tool gives general information based on published guidance. It does not diagnose you and does not replace advice from a doctor who knows your situation. You choose the illness; we do not work out what you have.

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