Why the 2nd Dose of Pfizer Vaccine Is So Crucial

New research finds the second dose of Pfizer's vaccine is key -- it makes a huge impact on the COVID vaccine's effectiveness.

Landwebs Landwebs
Jul 22, 2021 - 07:00
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Why the 2nd Dose of Pfizer Vaccine Is So Crucial
Syringes and graph illustration

New research finds the second dose of Pfizer's vaccine is key -- it makes a huge impact on the COVID vaccine's effectiveness.

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