Study: COVID booster cuts severe COVID risk by a third in patients with weak immune systems
University of Minnesota http://twin-cities.umn.edu/ 612-625-5000 One dose of the updated, single-strain COVID-19 vaccine introduced last fall is 38% effective against hospitalization in the 7 to 59 days after receipt and 34% effective at 60 to 119 days in adults with weakened immune systems, yet uptake in this group is low, estimates a study published today in Morbidity and Mortality Weekly Report. US Centers for Disease Control and Prevention (CDC) researchers led the study, which was based on data from