CDC Changes COVID-19 Vaccine Guidance to Okay Mixing Pfizer and Moderna Shots

The Centers for Disease Control and Prevention (CDC) quietly changed its guidance on COVID-19 vaccinations, saying it is okay to mix use of Pfizer’s and Moderna vaccine for first and second doses in “exceptional situations” and that it’s also fine to wait up to six weeks to get the second shot of either company’s two-dose immunization. While Pfizer’s and Moderna’s vaccines, which both use messenger RNA technology, were authorized to be given 21 and 28 days apart, respectively, the CDC now says you can receive either shot so long as they are given at least 28 days apart, according to new guidance posted Thursday on its website. Read more.