What should you know about coronavirus incubation period?

A person can be infected before noticing symptoms, and some infected people never develop noticeable symptoms. The interval varies between people and can be influenced by the virus variant, immunity and the amount of exposure. Counting from a suspected contact cannot prove exactly when infection occurred.

Possible early symptoms include fever, cough, headache, fatigue and a general feeling of being unwell. These signs can also come from other illnesses. The absence of symptoms does not by itself confirm that you are not infected, while a symptom does not establish COVID-19 without appropriate assessment or testing.

Follow current local guidance after a known exposure. Monitor how you feel, reduce close contact with people at higher risk if you become unwell, and improve ventilation in shared spaces. If symptoms start, stay home where possible and seek advice about testing and work or school precautions.

Write down when the exposure may have happened and when each symptom began. Contact a clinician promptly if you are pregnant, have a long-term condition, or have a weakened immune system, because early decisions may matter. Explore COVID-19, Cough, Fever and Headache for related information.

Get urgent help for severe breathlessness, persistent chest pressure, new confusion, inability to stay awake, or blue or grey lips or skin. Seek medical advice if symptoms steadily worsen, fever does not settle, or you cannot drink enough. Breathing difficulty with fever or cough can signal pneumonia and should be assessed.

Ask which local testing and isolation advice applies to your exposure, whether your medicines or health conditions increase risk, and what changes should prompt review. If fatigue continues after the infection, ask whether follow-up for Long COVID is appropriate.