COVID-19 Basics

There have been no confirmed cases in the scientific literature of people being infected a second time by the virus that causes COVID-19.

The COVID-19 death rate is down from its peak. But there are a few reasons for that, and the rate will probably rise again soon, so stay vigilant!

The 1918 flu pandemic holds lessons for today’s COVID-19 pandemic.

There is evolving data about whether COVID-19 transmission commonly occurs by aerosol transmission. For most people, the answer to this scientific debate probably won’t make a huge difference in the...

Mathematical models have been used to predict the spread of COVID-19 and are updated when new data are available.

The coronavirus that is causing this pandemic probably infected bats before it jumped to humans.

New research shows that infected people with no symptoms sometimes have abnormal CT scans. But it also suggests they can get others sick for weeks!

About one out of ten people with COVID-19 report having a headache.

Scientists think they might be able to track the novel coronavirus in sewage, which is one way to help public health workers locate and respond to COVID-19 outbreaks.

COVID-19 remains a public health emergency. But many people are weighing this against another public health emergency: the real and deadly effects of racism.