How long after COVID exposure should you watch for symptoms?

Exposure means being near someone who may have been infectious. Some people develop symptoms after an interval, while others have mild symptoms or none. A symptom-free period does not guarantee that infection is absent, and symptoms alone cannot prove COVID-19.

Watch for fever, sore throat, cough, headache, tiredness, body aches, changes in smell or taste, or breathing symptoms. If symptoms continue after the acute illness, Fatigue, Difficulty Concentrating, Joint Pain, Loss of Smell, Loss of Taste, or Low Mood may need assessment for causes including Long COVID.

Follow the latest advice from local health authorities or your clinician about when to test and whether repeat testing is needed. During monitoring, improve ventilation, avoid close contact with people at higher risk, and wear a well-fitting mask where advised or practical.

If symptoms begin, stay home when unwell, arrange appropriate testing, rest, drink fluids, and tell a healthcare professional if you have risk factors for severe illness. Record the exposure date, symptom onset, test dates, and results.

Seek emergency help for difficulty breathing, persistent chest pain or pressure, new confusion, inability to wake or stay awake, or pale, grey, or blue lips or skin. Urgent assessment is appropriate regardless of the time since exposure.

Contact a clinician promptly if symptoms are worsening, you cannot keep fluids down, or you have a condition or treatment that weakens your immune system. Ask about treatment timing if you test positive and have risk factors.

Ask when to test, whether repeat testing is needed, how long to limit contact, which symptoms matter for your health history, and when persistent symptoms should be evaluated for Long COVID or another cause.