Next flu season could be extra weird, and potentially very bad By Nicoletta Lanese Upcoming flu outbreaks will be less predictable than those of the past.
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.
Devious sperm 'poison' their rivals, forcing them to swim in circles until they die By Brandon Specktor Mouse sperm carrying a genetic sequence called the t-haplotype will poison their competitors, then make an 'antidote' only for themselves, new research finds.
Is it OK to mix and match COVID-19 vaccines? Oxford researchers begin trial. By Yasemin Saplakoglu Amid a shortage of vaccine supplies and the threat of emerging coronavirus variants, such an approach might provide an answer for both.
The sneaky way the coronavirus mutates to escape the immune system By Rachael Rettner The mutations 'disguise' the virus from antibodies.
Cancer patients weren't responding to therapy. Then they got a poop transplant. By Nicoletta Lanese The gut microbiome may be critical to immunotherapy.
These star-shaped brain cells may help us understand depression's biological roots By Ashley P. Taylor The brains of people with depression have fewer astrocytes, a type of brain cell, according to a small study.
AstraZeneca COVID-19 vaccine may cut spread of virus By Yasemin Saplakoglu This is the first time that a coronavirus vaccine has shown it may reduce the spread of the virus.
Horse tranquilizer emerges as new and deadly street drug in US By Rachael Rettner Called xylazine, the drug is a sedative used in veterinary medicine, and is not approved for use in humans.
UK coronavirus variant develops vaccine-evading mutation By Rachael Rettner This mutation has also been seen in a novel coronavirus variant in South Africa.
South African coronavirus variant: All your questions answered By Rachael Rettner Experts are particularly alarmed by this variant because of its potential to "escape" protection from current vaccines.
Can people be allergic to exercise? By Tara Santora Is it possible to be allergic to activities like running or walking?
Can moms pass COVID-19 immunity to their newborns? By Nicoletta Lanese A new study shows that antibodies can cross the placenta and could be protective to the baby.
'Flatliners' still have heartbeats left. But death comes within 5 minutes. By Stephanie Pappas People's heartbeats may stop and restart as they die, with implications for the practice of organ donation.
Johnson and Johnson's vaccine is 66% effective against moderate to severe COVID-19 By Yasemin Saplakoglu The vaccine's efficacy was highest in the U.S. and the lowest in South Africa, where a new variant is infecting people.
Ultrasound treatment 'jump-started' the brains of 2 people in coma-like state By Rachael Rettner The two patients who received the treatment showed significant progress over just days.
