Teachers may play a central role in spreading COVID-19 in schools, CDC says By Rachael Rettner published 22 February 21 The findings highlight "the importance of preventing infections among educators in particular," the authors said.
Another new coronavirus variant now detected in 13 countries By Ashley P. Taylor published 19 February 21 As of Feb. 17, there had been 46 cases of the new variant confirmed in the U.K.
30% of people with COVID-19 experience symptoms up to 9 months later By Rachael Rettner published 19 February 21 Most participants in the study initially had mild cases of COVID-19.
Still no evidence of COVID-19 transmission from food, FDA says By Nicoletta Lanese published 19 February 21 The FDA statement pours cold water on a theory that the novel coronavirus emerged outside China and was brought in on imported frozen food.
Entire Brazilian city will be vaccinated against COVID-19 in giant experiment By Yasemin Saplakoglu published 18 February 21 Scientists will vaccinate all the adults in a single city to see whether a COVID-19 vaccine will reduce cases.
At least 20 million years of life have been lost to COVID-19, study suggests By Rachael Rettner published 18 February 21 On average, each COVID-19 death resulted in 16 years of life lost.
Severe COVID-19 may damage the eyes, small study hints By Rachael Rettner published 17 February 21 The researchers saw "nodules" at the back of patients' eyes, which can be signs of inflammation or direct damage to the eye.
Hundreds of animal species could harbor novel coronaviruses By Nicoletta Lanese published 16 February 21 A new model predicts which mammals might be likely hosts for new coronaviruses.
Who should get the Johnson & Johnson vaccine over the mRNA vaccines? By Jocelyn Solis-Moreira, MS published 15 February 21 Each vaccine has its pros and cons, but all work extremely well.
Prior infection with common cold viruses won't protect against COVID-19 By Yasemin Saplakoglu published 13 February 21 For months, scientists have wondered whether past exposure to seasonal coronaviruses that cause common colds might prevent people from getting a severe case COVID-19.
CDC issues new guidelines for safely reopening schools By Rachael Rettner published 12 February 21 The recommendations provide a "long-needed road map" for reopening schools, officials said.
California coronavirus variant is spreading rapidly. Should we worry? By Rachael Rettner published 11 February 21 Known as CAL.20C, the variant now accounts for nearly half of COVID-19 cases in Southern California.
COVID-19 vaccines: What does 95% efficacy actually mean? By Anna Nowogrodzki published 11 February 21 You have likely heard that Pfizer's COVID-19 vaccine efficacy is 95%, Moderna's is 94% and Johnson & Johnson's is 66%. But what do these numbers actually mean?
Is there a limit to how much the coronavirus can mutate? By Yasemin Saplakoglu published 11 February 21 The number of possible genetic mutations is greater than all the atoms in the visible universe,
Coronavirus may infect key brain cells, causing neurons to die By Nicoletta Lanese published 10 February 21 A preliminary study hints that the virus may infect astrocytes, triggering downstream effects.
CDC says double-masking improves protection from COVID-19 By Rachael Rettner published 10 February 21 The study tested several methods for improving mask fit.
Europe's oldest person survives COVID-19 By Yasemin Saplakoglu published 10 February 21 Sister André has recovered from COVID-19 in time for her 117th birthday this week.
COVID-19 may lower sperm counts, small study finds By Rachael Rettner published 9 February 21 In a study of 43 men who had recovered from COVID-19, nearly 20% had azoospermia, or the total absence of sperm in semen.
Fast-spreading coronavirus variant is doubling every 10 days in the US By Yasemin Saplakoglu published 8 February 21 The variant is rapidly spreading in the U.S. as it has in the U.K. and elsewhere around the world.
Is it OK to mix and match COVID-19 vaccines? Oxford researchers begin trial. By Yasemin Saplakoglu published 5 February 21 Amid a shortage of vaccine supplies and the threat of emerging coronavirus variants, such an approach might provide an answer for both.
