As residents prepare to roll up their sleeves for a third, fourth or even fifth dose of COVID-19 vaccine, some may be wondering: Do I need to stick with the same brand, or is it safe to mix it up?

COLORADO, USA — Clinical trials in the United Kingdom are currently underway to study the efficacy effects of mixing two different COVID-19 vaccines, according to CNBC. While the CDC stated it is OK ...

Efforts to give a Covid-19 booster shot to certain adults in the United States have officially begun, following a week of intense deliberation from government advisory committees. Early Friday, ...