I’m Covid Antibody Negative Despite Being Fully Vaccinated; Is That a Problem?

A physician looks at how our immune systems respond to the Covid vaccine

Photo: RF._.studio/Pexels

I received my second dose of the Pfizer-BioNTech Covid-19 vaccine on January 4th of this year. I donated blood on March 19th. The donation center routinely checks for antibodies to Covid-19 in their donors. To my…