Primary and original booster mRNA vaccination can reduce the risk of Omicron-related infection

mRNA COVID-19 vaccines are less effective against Omicron infections than other variants. A study publishing December 1st in the open access journal PLOS Medicine by Margaret L. Lind at the Yale School of Public Health, U.S. and colleagues suggests that the additional protection offered by the initial booster shot may be reduced among people with a previous COVID-19 infection.