State and local health officials say they are struggling to make sense of the new Covid-19 isolation and quarantine guidelines from the US Centers for Disease Control and Prevention.
They say the CDC released the updated advice, which cuts in half the recommended times for staying away from others, with little consultation or preparation.
A traveler isolated for Covid-19 at a quarantine facility in New Zealand managed to infect three others across a hallway, researchers reported.
Closed-circuit camera footage, genetic testing and careful contact tracing show that the only conceivable way the virus could have passed from one room to another was in air that leaked out when both doors were briefly opened, the researchers said.
Medecins Sans Frontieres usually works in war zones or developing countries. Now they're in Detroit, helping out with coronavirus.
Here's why crowded bars are so perfect for spreading coronavirus: they are stuffy, people are close and talking with raised voices. But the lack of ventilation is a major factor, these scientists say.
Single carriers kept seeding coronavirus cases early on in California. One ended up infecting 700 people on a cruise ship. Another only infected two other people.
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The federal government's "Operation Warp Speed" vaccine program, with its emphasis on quick production of experimental coronavirus vaccines, is fueling fears already stirred up by vaccine skeptics
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Bodies of African-American Covid-19 victims were riddled with blood clots, autopsies in New Orleans show.
How many people have coronavirus? Sometimes, it's just a guess. That's because testing isn't as straightforward as you might think. Read more here.
When is it safe to go back out if you have been sick? The CDC has some advice for you. Also some pointers on using public transport to get back out there. Read more here.
Up to 80 million children are missing out on lifesaving vaccines because of coronavirus, the WHO says. Full story is here.
Coronavirus testing in the US is disorganized and needs better coordination, a new report finds. Find out more here.
Children may not always show symptoms of coronavirus infection, but a few may have a rare and troubling syndrome later. Here are the signs to look for.
Doctors are finding a range of effects of coronavirus, from blood clots to kidney failure. Here's why coronavirus is more than just a respiratory infection.
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