Lengthy clinical trials to test vaccines modified for variants won't be necessary, FDA says By Yasemin Saplakoglu The testing process for modified vaccines will likely be similar to that of the annual flu shot, FDA says.
Teachers may play a central role in spreading COVID-19 in schools, CDC says By Rachael Rettner 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 The study tested several methods for improving mask fit.
Europe's oldest person survives COVID-19 By Yasemin Saplakoglu 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 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 The variant is rapidly spreading in the U.S. as it has in the U.K. and elsewhere around the world.
