By Apoorva Mandavilli
Airborne virus plays a significant role in community transmission, many experts believe. A new study fills in the missing piece: Floating virus can infect cells.
Published: August 10, 2020 at 08:00PM
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By Donald G. McNeil Jr.
The E.P.A. has approved nootkatone, which is found in cedars and grapefruit. It repels ticks, mosquitoes and other dangerous bugs for hours, but is safe enough to eat.
Published: August 9, 2020 at 08:00PM
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By Apoorva Mandavilli
Researchers in South Korea found that roughly 30 percent of those infected never develop symptoms yet probably spread the virus.
Published: August 5, 2020 at 08:00PM
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By Katherine J. Wu
Some people carry immune cells called T cells that can capitalize on the virus’s resemblance to other members of its family tree.
Published: August 5, 2020 at 08:00PM
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By Katherine J. Wu
Studies of patients with severe cases of Covid-19 show the immune system lacks its usual coordinated response.
Published: August 3, 2020 at 08:00PM
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By Apoorva Mandavilli
Tuberculosis kills 1.5 million people each year. Lockdowns and supply-chain disruptions threaten progress against the disease as well as H.I.V. and malaria.
Published: August 2, 2020 at 08:00PM
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By Roni Caryn Rabin
The camp took precautions but did not require campers to wear masks, the C.D.C. reported. Singing and cheering may have helped spread the virus.
Published: July 30, 2020 at 08:00PM
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