Booster shots to extend the protection of COVID-19 vaccines may be unnecessary for many people, a leading scientist behind the AstraZeneca vaccine branded as Covishield in India said on Friday.
Oxford University Professor Sarah Gilbert told The Telegraph newspaper that immunity from the vaccine was holding up well — even against the delta variant.
While the elderly and those who are immune-compromised may need boosters, the standard two-dose regimen is providing lasting protection for...
