After vaccination, if the body is later exposed to those disease-causing germs, the body is immediately ready to destroy them, thus preventing illness. Covid-19 vaccines may not prevent infection after exposure to SARS CoV-2. The effective vaccination plan, tailored to local needs (like other non-pharmacological interventions) was successful in the containment of the disease. First, a booster dose is now recommended 5 months after the primary series and the second booster dose may be administered 4 months after the first booster dose. The pandemic to endemic transition would be complete when the overall Covid-19 disease rates become static — neither rising nor falling.

Source: The Nation June 15, 2022 10:29 UTC