vaccines

How Does the COVID Vaccine Work?

Introduction to COVID-19 and Vaccines COVID-19 is a highly infectious respiratory illness caused by the novel coronavirus SARS-CoV-2. The virus first emerged in Wuhan, China, in late 2019, and since then, it has spread rapidly across the world, causing a global pandemic. COVID-19 can cause severe illness, especially in older adults and people with underlying medical conditions. The symptoms of…