Not long ago, we were all masters of covid math. When the pandemic began in 2020, the number stuck in our minds was 14: If we (or any close contact) got a positive COVID-19 test, we were supposed to ...

Long COVID affects an estimated 65 million people worldwide and can damage the brain, heart, blood vessels, and immune system ...

Millions of people who recover from infections like COVID-19, influenza and glandular fever are affected by long-lasting symptoms. These include chronic fatigue, brain fog, exercise intolerance, ...

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Five years ago, a mysterious new virus emerged in Wuhan, China, marking the start of a global health crisis. Initially nameless, the virus and the illness it caused would eventually ignite a global ...

Deaths from COVID-19 have slowed significantly but continue adding to a tally of more than 7 million deaths from the virus in the nearly five years since the World Health Organization (WHO) declared a ...

Both H1N1 and COVID-19 spread across the U.S. faster and more unpredictably than early detection systems could keep up.