"Ventilation is the way forward," says infectious disease doctor Abraar Karan of Stanford. Here's how to get better air flow at home, in schools and offices — even in gyms — to stave off COVID.
New versions of omicron are circulating in the United States and South Africa. Two new studies shed light on the potential for future surges — and the risk factor if you've already had omicron.
With COVID case counts falling and rising, testing is critical. But how many days after exposure should I test? And if I have symptoms but test negative, might the test not be accurate?
My 6-year-old has been exposed to SARS-CoV-2 at least four times and never tested positive. Many people fall into that category. Researchers have theories about why they've been able to ward it off.
That's how the so-called "deltacron" variant — a mashup of delta and omicron — came to be. This process of recombining tells us a lot about the possible past and future of SARS-CoV-2.
Studies on white-tailed deer in Pennsylvania and Ontario offer evidence that the mammals are a reservoir for the coronavirus. What are the implications for the course of SARS-CoV-2?
A new study documents that infected hamsters, imported from the Netherlands, passed the virus on to humans. Previously only minks had been identified as a source of animal-to-human transmission.
A look at the data that omicron is less severe. What does that mean for the future of SARS-CoV-2 — and the pandemic?
There's serious concern about the effectiveness of vaccines against the omicron strain. But there's also reason to be hopeful — especially for those who've had a booster.
Scientists have begun to find abnormalities in the immune systems of some long-COVID patients that might help explain the syndrome, at least in some people. But there is still much more to learn.
It could turn out to be the eighth coronavirus known to spread to humans. Some scientists think doctors and researchers should start actively looking for this virus in patients.
Pandemic predictions have been made — and then things would change. But based on models and studies (including a 1980s test that squirted virus up human noses), researchers have a new endgame thesis.
The lab has access to a high-security facility that Pfizer needed to prove its COVID-19 vaccine was working. Now the scientists there are testing the vaccine's effectiveness against viral variants.
One of the scientists who signed a recent letter calling for more investigation of the lab-leak origin theory says new data has come to light. And that information has changed his thinking.