CreakyJoints reports the U.S. Food & Drug Administration (FDA) confirmed emergency use authorization (EUA) of a third Pfizer COVID-19 vaccine shot for people with severe risk, and includes guidance from experts including S. Louis Bridges, Jr., MD, PhD, physician-in-chief, chair of the Department of Medicine and chief of the Division of Rheumatology at HSS.

In the United States, public health officials recommend sticking with one type of mRNA vaccine for the first two doses. However, switching is permitted for the third dose for immunocompromised people if necessary but the data is still being reviewed.

According to Dr. Bridges, “We don’t yet have sufficient evidence to know if there is an effect of taking two doses of one of the mRNA vaccines and a third dose of the other. At this time, additional doses of the J&J vaccine are not recommended, simply because we have much less data on this vaccine.”

Read the full article at Creakyjoints.org.