ET Online
Nov 23, 2021
The US, and many European countries are rolling out Covid vaccine booster shots.
Image Source: AP
There isn't consensus among scientists about its necessity, but some studies back it.
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The W.H.O wants the most vulnerable people worldwide to be fully vaccinated first.
Image Source: AFP
India too has indicated it is now focussed on completing second doses for its people.
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Booster doses hinge on the understanding that vaccine immunity wanes after 6 months.
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Studies show immunity from mRNA vax, like Moderna & Pfizer, lasts longer after a booster.
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Campaigns are initially focused on the elderly and those with weakened immune systems.
Image Source: AFP
Also recommended for those with higher infection risk, like frontline and healthcare workers.
Image Source: AP
Booster approvals may soon pick up as some countries suffer another round of infections.
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