HYDERABAD: About 30% of those who have received two doses of a Covid-19 vaccine lose their vaccine-acquired immunity after six months, according to a study conducted by AIG Hospitals and Asian Healthcare Foundation to understand the longevity of vaccine immunity in the Indian population with respect to antibody levels.
The study also found that a majority of those in this group were individuals aged over 40 years with co-morbidities like hypertension and diabetes, indicating that such individuals were at higher risk of getting infected despite being double vaccinated and need to be prioritised for a booster dose after six months.
