COVID-19 and Vaccination Update

By Lily H-A

From PHN Issue 46, Spring/Summer 2021

On February 27, 2021, the Food and Drug Administration (FDA) approved a third COVID-19 vaccine, developed by Johnson & Johnson (J&J, sometimes called “Janssen”) under the same shortened process as the other two currently approved vaccines (Pfizer-BioNTech and Moderna).

The J&J vaccine only requires one dose instead of two, and doesn’t need ultra-cold refrigeration, so it’s easier to distribute. It also uses slightly different technology from Pfizer and Moderna’s vaccines. All three vaccines work by making the cells in your body produce harmless proteins that look like parts of the coronavirus, which teaches your immune system how to recognize and destroy the actual coronavirus if it enters your body. Pfizer and Moderna’s vaccines use a messenger called mRNA to do this, while J&J’s uses a deactivated virus called an adenovirus. This deactivated virus cannot infect you, and is not the same as the coronavirus.

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