How the Virus Spreads

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.

People at increased risk include:

• Older adults.
• People of all ages with certain underlying medical conditions.

Pregnant people are also at increased risk for severe illness from COVID-19.
Long-standing systemic health and social inequities have put many people from racial and ethnic minority groups at increased risk of getting sick and dying from COVID-19.
In addition to those at increased risk, there are certain groups of people who require extra precautions during the pandemic.

Coronaviruses are thought to be spread most often by respiratory droplets. Although the virus can survive for a short period on some surfaces, it’s unlikely to be spread from domestic or international mail, products or packaging. However, it may be possible that people can get COVID-19 by touching a surface or object that has the virus on it and then touching their own mouth, nose or eyes, but this is not thought to be the main way the virus spreads.

Learn more about safe handling of deliveries and mail from the CDC.