CDC recommends that people remain up to date with their vaccines, which includes additional doses for individuals who are immunocompromised or booster doses at regular time points. Individuals who are moderately or severely immunocompromised should get an additional primary shot and a booster shot.
Studies show after getting vaccinated against COVID-19, protection decreases over time and may also be decreased due to changes in circulating variants. The recent emergence of the Omicron variant further increases the importance of vaccination and boosters to protect against COVID-19.
Current surveillance data from the United States demonstrate that it is critically important for people to remain up to date with CDC’s vaccine recommendations. In November, those who were unvaccinated were more than 3 times more likely to test positive for infection compared to those who were vaccinated and more than 9 times likely compared to those who were boosted.