The vaccines are working very well to prevent the worst cases of COVID-19 that lead to hospitalization or death, even against the highly contagious Delta variant. The virus is constantly changing and scientists are seeing reduced protection against mild and moderate disease. A booster dose is recommended for all individuals 18 years and older if it has been at least 6 months after receiving their second Moderna or Pfizer-BioNTech vaccine, or at least two months after receiving the one-dose Johnson & Johnson vaccine.
Category: 02. Vaccines