There are two recent concerns about the COVID-19 vaccines, including one that has not yet happened and one that already has.
I. Will the FDA Approve new COVID-19 Vaccines Based on ‘Preclinical Data’ and Allow the Vaccines to Become Similar to the Flu Vaccines?
The existing COVID-19 vaccines are based on the older virus that is more virulent than the current strains. And as the virus continues to evolve, the vaccines’ protection declines. Recently, Pfizer has begun developing its Omicron vaccines.Pfizer is developing two types of Omicron vaccines, including one monovalent vaccine that directly replaces the original strain with the Omicron variant, and a bivalent vaccine that contains both original strain and an Omicron strain which would partially neutralize the challenging Omicron variant with the immunity triggered by the original strain.