Now that multiple COVID-19 vaccinations are on, or are soon to be on the market, there's a percentage of efficacy attached to each of them. Pfizer and Moderna are promising about 95% protection after two doses. And Johnson and Johnson is promising 66% after one dose. But what does that actually mean? "It's not like me, myself, now has 66% immunity. It's more of a population measure," says Dr. Deepta Bhattacharya, University of Arizona College of Medicine. It comes down to clinical trials.

Immunobiologist Dr. Deepta Bhattacharya answers common questions about what to expect after receiving the COVID-19 vaccine.

The antibody test developed by the UArizonaHealth Sciences research team can be used to confirm a positive antibody response after receiving a COVID-19 vaccine.

A public health research team is providing guidance to beauty, auto shop owners in Spanish-speaking areas to reduce COVID-19 infection risks.

The ongoing pandemic has given rise to a significant and alarming trend of increased alcohol use and abuse – especially among younger adults, males and those who have lost their jobs – according to a new study by University of Arizona Health Sciences researchers.

Vaccination efforts are racing against community spread of COVID-19. As more people become eligible for vaccination, Deepta Bhattacharya, an immunobiologist at the University of Arizona College of Medicine - Tucson, answers common questions about what to expect after the shot.

A study led by researchers in the Department of Psychiatry found hazardous alcohol use increased monthly for those under stay-at-home orders.

Health advocates welcomed Monday's reopening of enrollment for Affordable Care Act coverage, saying the opportunity for more people to get or renew their health insurance could be "really good for Arizona." The normal period for Americans to sign up for coverage ended Dec. 15, but President Joe Biden called for this special 90-day open enrollment period in response to the ongoing COVID-19 crisis. The change could open the door to subsidized health insurance for thousands in Arizona, where as many as 900,000 people may not have health insurance, according to Dr. Dan Derksen, director of the University of Arizona Center for Rural Health.