Challenge trials help researchers study immune responses. Skeptics still doubt the approach is worth the risks ...

If you’ve been hit with a respiratory tract infection this festive season, it’s more likely to be Covid-19 than the flu.

A statewide grand jury didn’t find evidence that COVID-19 vaccine manufacturers broke federal or state laws when making and ...

In 2023, the WHO estimated that the real death toll of the pandemic was at least 20 million Covid-19: over 7 million deaths ...

After a relatively slow start to the respiratory virus season, Covid-19 levels in the United States began ramping up just ...

The world first became aware of Covid-19 five years ago. We evaluate where we are, remember how we got here, and consider ...

From carbon emissions to the share price of videoconferencing firm Zoom, these graphs tell the story of how the covid-19 ...

Another year has gone by since the 2020 pandemic and COVID-19 remains at large, so experts weigh in on what will change in 2025.

The first severe human case of bird flu was recently reported in the U.S. Here are some ways the U.S. may be repeating the ...