But researchers warn there is still a risk of catching and passing the virus on to others again.
Jan. 14, 2021 • ~3 min
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US greenhouse gas emissions tumbled below their 1990 level last year, because of Covid-19 shutdowns.
Jan. 12, 2021 • ~3 min
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How a year of intense scientific effort unravelled the secrets of a virus that shut down the world.
Jan. 10, 2021 • ~18 min
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Scientists are rushing to find out more about mutations in a variant of coronavirus causing concern.
Dec. 22, 2020 • ~4 min
Some trial volunteers were given shots half the planned strength, so how does that affect the results?
Nov. 26, 2020 • ~6 min
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