The U.S. Centers for Disease Control and Prevention (CDC) has released a CDC study looking at the efficacy of vaccines against Omicron strains in the U.S. and stressed the importance of booster vaccination to prevent serious illness. from the Omicron strain that is currently spreading heavily in the United States. More than 99% of new infections are of this strain. The booster vaccine can prevent the risk of an infected person requiring emergency medical care. or the opportunity to be hospitalized from COVID-19
In addition, one study, collecting data from late August 2021 and early January 2022, found that Pfizer or Moderna booster vaccination reduced the risk of hospitalization. in the hospital or emergency room up to 94% during the outbreak of the Delta strain and 82% during the onset of the Omicron strain.