The virus that causes COVID-19 is thought to spread mainly through close contact from person to person, including between people who are physically near each other (within about six feet). People who are infected but do not show symptoms can also spread the virus to others. Cases of reinfection with COVID-19 have been reported but are rare. We’re still learning about how the virus spreads and the severity of illness it causes.
How easily a virus spreads from person to person can vary. The virus that causes COVID-19 spreads very easily from person to person. It appears to spread more efficiently than influenza but not as efficiently as measles, which is among the most contagious viruses known to affect people.
For more information about how COVID-19 spreads, visit the CDC’s How COVID-19 Spreads
page, which also includes tips on how to protect yourself.