How long has COVID been around?

COVID-19 has been known since late 2019 and continues to circulate, with infections and symptoms changing over time. It is caused by the SARS-CoV-2 virus. The first recognised outbreak led to a global pandemic, after which the virus became an ongoing part of respiratory infection care.

The length of time COVID-19 has existed does not tell you how severe an individual infection will be. Protection from earlier infection or vaccination can change, and new variants may behave differently from earlier forms of the virus. Symptoms can resemble other respiratory illnesses, so a symptom alone cannot identify the cause. Common features may include fever, cough, sore throat, tiredness, or changes in smell and taste. Some people recover promptly, while others have symptoms that persist or develop after the initial illness; this is often called Long COVID or post-COVID-19 syndrome.

If you develop a new respiratory illness, rest, drink fluids, and reduce close contact with other people while you are unwell. Follow the current local advice on testing and staying home, especially if you live with someone at higher risk of serious illness. A clinician can help you decide whether testing, monitoring, or treatment is appropriate based on your symptoms and health history. Seek advice if tiredness, difficulty concentrating, joint pain, low mood, or altered smell and taste continue after the acute illness.

Arrange medical advice promptly if symptoms are worsening, fever does not settle, you cannot keep fluids down, or you have a medical condition that raises your risk from infections. Get urgent help for severe difficulty breathing, persistent chest pressure, new confusion, unusual difficulty staying awake, or blue, grey, or very pale lips or skin. Do not wait for a test result when breathing or alertness is seriously affected.

You could ask whether your symptoms fit COVID-19 or another infection, whether testing would change your care, how to reduce spread at home, and which warning signs should prompt urgent review. If symptoms remain after recovery, ask what follow-up is needed and whether another condition should be checked.