The results of a US study showed that the efficacy of the Pfizer vaccine changed differently among different age groups five months after taking the second shot.
The efficacy declined from 89 percent to 39 percent in the 16 to 44 age group, from 87 per cent to 50 per cent in the 45 to 64 group, and from 80 per cent to 43 per cent in people aged 65 or older.
The panel urged the Ministry to promote booster shots for elderly people and others with a high risk of turning severe cases, as the vaccine efficacy for them is expected to decline over time.
Source: IANS
