How does it spread?

Although the virus that causes COVID-19 probably emerged from an animal source, it is thought to spread mainly from person-to-person via respiratory droplets produced when an infected person coughs or sneezes. People are thought to be most contagious when they are most symptomatic (the sickest). How easily a virus spreads from person-to-person can vary. Some viruses are highly contagious (like measles), while other viruses are less so. Another factor is whether the spread is sustained. The virus that causes COVID-19 seems to be spreading easily and sustainably in Hubei province and other parts of China. In the U.S., spread from person-to-person has occurred only among a few close contacts and has not spread any further to date.

Show All Answers

1. What are the symptoms?
2. How does it spread?
3. How is it treated?
4. How is COVID-19 diagnosed?
5. Do I need to wear a mask?
6. What can travelers do to protect themselves and others?
7. What if I recently traveled to China?