During a Tuesday briefing, the CDC’s director of the National Center for Immunization and Respiratory Diseases Nancy Messonnier warned that self-imposed quarantines could last weeks.

“You may need to take a break from your normal daily routine for two weeks,” she said, as quoted by The Washington Post.

“Staying home when you are sick is really important,” she added. “Don’t let the illness spread beyond you. Stay away as much as you can from other people.”