2023-04-18 19:50:00
A Food and Drug Administration (FDA)the regulatory agency for food and medicine in the United States, revoked the authorization of Pfizer / BioNTech and Moderna vaccines, originally developed against covid-19 and applied from the end of 2020. Now, only bivalent vaccines, from the same manufacturers, are authorized in the country.
These vaccines, which were only being used as a booster, will now even be used as a first dose. According to the laboratories, they protect against the original form of the coronavirus and against the Omicron variants and subvariants.
“This action includes authorizing the use of current bivalent vaccines (original strains and Omicron BA.4/BA.5) for all doses administered to individuals from 6 months of age, including for additional dose or doses for certain populations. Moderna’s and Pfizer/BioNTech’s monovalent COVID-19 vaccines are no longer authorized for use in the United States,” the FDA said in a statement.
The bivalent doses of Moderna and Pfizer contain two parts of the coronavirus in their formulations, half of the original strain, discovered in 2019, and half of the Omicron variant, prevalent in the world today. With this, they extend protection against the version of the disease that currently circulates.
Initially, these doses were authorized only as booster applications, that is, after at least two doses of the original vaccines. In the US, the government recommends a booster with the bivalent vaccine to the entire population from 6 months of age.
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