Pfizer has indicated that a third dose of its vaccine may be needed within six to 12 months after full vaccination, as initial immunity wanes and as new and more aggressive variants of the Coronavirus continue to spread. The company says that it has preliminary data to prove that an additional dose.
Pfizer has indicated that a third dose of its vaccine may be needed within six to 12 months after full vaccination, as initial immunity wanes and as new and more aggressive variants of the Coronavirus continue to spread. The company says that it has preliminary data to prove that an additional dose.
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