The US Centers for Disease Control and Prevention (
CDC) on Thursday
recommended Covid-19 booster shots from Pfizer and Moderna targeting the
Omicron variant, clearing the way for the administration of the shots.
اضافة اعلان
This new generation of anti-Covid vaccines targets both the original strain
of coronavirus and the BA.4 and BA.5 lineages, the subvariants of Omicron that
are causing the most cases in the United States.
The Pfizer-BioNTech shot is recommended for people 12 and older and
Moderna's for those 18 years and up.
"The updated Covid-19 boosters are formulated to better protect against
the most recently circulating Covid-19 variant. They can help restore
protection that has waned since previous vaccination and were designed to
provide broader protection against newer variants," CDC Director Rochelle
Walensky said in a statement.
"This recommendation followed a comprehensive scientific evaluation and
robust scientific discussion," she added.
The new versions of the vaccines -- which were approved by the US Food and
Drug Administration on Wednesday -- could potentially be available in the
United States as early as next week.
The vaccines currently in circulation target the initial strain of the virus
that first appeared in Wuhan, China. But they have gradually proven to be less
effective against the variants that have appeared over time, due to rapid
evolution of the virus.
In contrast to the Alpha and Delta variants, which eventually waned, Omicron
and its subvariants have come to dominate infections worldwide in 2022.
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