(SARS)-CoV-2, Hygiene Hypothesis, and WBC Counts
(SARS)-CoV-2, or COVID-19, took the world by storm in March of 2020 when the World Health Organization (WHO) declared COVID-19 a pandemic. On December 11, 2020 the Food and Drug Administration (FDA) gave emergency use authorization (EUA) to a vaccine developed by Pfizer-BioNTech for those 16 or older. A week …