COVID-19 Basics
COVID-19: What It Is and How It Spreads
COVID-19 is an illness caused by the SARS-CoV-2 virus. This introductory guide explains respiratory spread, shared indoor air and why local guidance…
ARTICLE CATEGORY
COVID-19 Basics
Understand what COVID-19 is, how SARS-CoV-2 spreads, and why public health guidance can change as evidence develops.