WorldUS government calls on laboratories to manufacture vaccines that...

US government calls on laboratories to manufacture vaccines that target omicron subvariants


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The FDA, Food and Drug Administration of USAcommunicated on Thursday to the producing laboratories that the booster vaccines against the coronavirus for autumn and winter boreal they should include elements specifically targeting the BA.4 and BA.5 sub-variants of the Omicron.


A committee of experts invited by the FDA to give an opinion on the issue ruled Tuesday in favor of targeted recalls against the variant. omicronand most scientists felt that newer strains should be targeted to prevent vaccines from being produced anti covid outdated by the rapid evolution of the virus.

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BA.4 and BA.5, which are more easily transmitted and more easily evade the human immune system, now account for more than 52% of cases in USAaccording to official data.

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These vaccines will also have to target the initial strain of covid-19 to amplify the immune response.

Laboratories Pfizer and Moderna, which produce messenger RNA vaccines against covid-19, have been developing and testing immunizers against BA.1, the first strain of omicron. Representatives from both companies told the committee meeting that it would take them about three months to produce BA.4 and BA.5 vaccines on a large scale.

Pfizer has published preliminary results showing that its BA.4 and BA.5 vaccine elicited strong antibody production in mice, but has not yet started human clinical trials.

For its part, Novavax, which manufactures a “subunit” vaccine (which contains a component of the virus but not completely), announced that it could offer containment for BA.4 and BA.5 by the end of this year.

Initial applications would continue to target the strain that first emerged in Wuhan, China, the FDA added.


Source: Elcomercio

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