COVID Booster dose
Dr. M. Swamy: Booster doses are administered to a vaccinated population that has completed a primary vaccination series (currently one or two doses of COVID-19 vaccine depending on the product) when, with time, the immunity and clinical protection has fallen below a rate deemed sufficient in that population.
WHO with support of the strategic Advisory Group of Experts (SAGE) on immunization and its COVID-19 Vaccines Working Group, is reviewing the emerging evidence on the need for and timing of an additional vaccine dose for the currently available COVID-19 vaccines which have received Emergency Use Listing.
Introducing booster dose should be firmly evidence driven and targeted to the population groups in greatest need. The rationale for implementing booster dose should be guided by evidence on waning vaccine effectiveness, in particular a decline in protection against severe disease in general population or in high risk population, or due to VOC.
To whom it should be given