An analysis of hundreds of COVID-19 cases suggests that face masks are most protective in specific circumstances, such as exposure to a person with COVID-19 that lasts for more than three hours or that takes place indoors1.
MIAMI (AP) — Florida’s top health official was asked to leave a meeting after refusing to wear a mask at the office of a state senator who told him she had a serious medical condition, officials have confirmed.
LONDON — For the last four months, Britain has run a grand epidemiological experiment, lifting virtually all coronavirus restrictions, even in the face of a high daily rate of infections. Its leaders justified the approach on the grounds that the country’s rapid rollout of vaccines had weakened the link between infection and serious illness.
Now, with cases, hospital admissions and deaths all rising again; the effect of vaccines beginning to wear off; and winter looming, Britain’s strategy of learning to live with the virus is coming under its stiffest test yet.
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