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?

And they have two choices: One from Moderna and one from Pfizer and BioNTech. Both are mRNA vaccines that induce high levels of virus-fighting antibodies. Both reduce the risk of infection and of ...

Last Wednesday, a Food and Drug Administration panel unanimously recommended the authorization of Moderna and Pfizer-BioNTech’s COVID-19 vaccines for children under 5.* It wasn’t long before ...