Have I already had Covid-19? How would I know and what should I do?

Coronavirus symptoms, when they occur, vary widely and undertesting means many people have probably been unwittingly infected * Coronavirus – latest updates * See all our coronavirus coverageCovid-19 symptoms vary widely, and undertesting in many countries means that many people may have already had the coronavirus without having received a positive diagnosis. Is it possible to find out, and how should you behave if you think you may have been infected? Is there any way to know whether som