COVID-19 is the illness caused by the novel coronavirus, SARS-CoV-2. While many people with COVID-19 get mild symptoms, others can become seriously ill. Several vaccines have been developed to protect against COVID-19. The Food and Drug Administration (FDA) has so far authorized three COVID-19 vaccines for emergency use. Two of these are the Pfizer-BioNTech and… Continue reading Why Do You Need Two Doses for Some COVID-19 Vaccines?
