Many Americans take immune-weakening drugs that may lower COVID vaccine response

In a new study from Michigan Medicine, researchers found that nearly 3% of insured U.S. adults under 65 take medications that weaken their immune...

Less than 1% of COVID-19 patients experience recurrence

In a new study from Intermountain Healthcare, researchers found that for every 10,000 confirmed COVID-19 cases, there are approximately 4.3 recurrent cases. In the study,...

Severe COVID-19 may be linked to long-haul symptoms

In a new study from the University of Michigan, researchers found that people who experience very severe COVID-19 illness have a higher prevalence of...

COVID-19 antibodies can last 8 months after infection, study finds

In a new study from San Raffaele hospital in Milan, researchers found that antibodies against the COVID-19 virus remained in the blood of patients...

Delaying second COVID vaccine dose may prevent deaths, study finds

In a new study from Mayo Clinic and elsewhere, researchers found that delaying the second dose of COVID-19 vaccines, at least for people aged...

COVID-19 could cause impotence in men, study finds

In a new study from the University of Miami, researchers found that the new coronavirus can linger in the penis and cause impotence in...

COVID-19 may strongly change your brain, study finds

In a new study from Georgia State University and elsewhere, researchers found that COVID-19 patients who receive oxygen therapy or experience fever show reduced...

COVID-19 can trigger recurrent blood clots in arms, study finds

In a new study from Rutgers University, researchers report the first instance of COVID-19 triggering a rare recurrence of potentially serious blood clots in...

Confused about the latest mask rules? Read this

The announcement that fully vaccinated people can now go without a mask in more places – indoors and outdoors – might sound like music to your...

Delaying second Pfizer vaccine strongly increases antibody responses in older people

In a new study from the University of Birmingham, researchers found that antibody response in older people is three-and-a-half times greater in those who...