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School closings have been a contentious issue since the pandemic broke out, and a new study has sparked debate over the 6-foot rule of social distancing and whether it can be relaxed in the classroom, which would make it easier for children…

Shannon Romano, a molecular biologist, met Covid in late March, about a week after she and her colleagues closed their laboratory at Mount Sinai Hospital. First there was a debilitating headache, followed by a fever that continued to rise,…

An AstraZeneca vaccine production line.Bloomberg | Bloomberg | Getty ImagesLONDON - The European Union has proposed that drug maker AstraZeneca reroute supplies of its coronavirus vaccine from the UK to mainland Europe as the battle over…

In late December, scientists in California began screening coronavirus samples for a rapidly spreading new variant that had just been identified in the UK.They found it, albeit in relatively few samples. The scientists made another…

Scans of a subset of roughly hundreds of vertebrae - some the size of grapefruit - showed the shark had died by the age of 46. The researchers estimated the Meg's life expectancy to be 88 to 100 years, suggesting that their sample was…

The team then predicted what the new variant would do over the next six months and built models that took different constraints into account. Without a broader roll-out of vaccines, they warned, "Cases, hospitalizations, ICU admissions and…