Frequently Asked Questions about COVID-19

A novel coronavirus (SARS-CoV-2) that causes COVID-19 first emerged in Wuhan, China in December 2019. Cases have been detected in most countries worldwide, and on March 11, 2020, the World Health Organization characterized the outbreak as a pandemic. Human-to-human transmission occurs through close contact.

Note: Information about COVID-19 can change rapidly. View the latest information on COVID-19 from the Centers for Disease Control and Prevention (CDC).

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COVID-19 Variants

Updated January 2024

Sources: American Academy of Pediatrics, Centers for Disease Control and Prevention, Food and Drug Administration

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