The vast majority of people recover. According to the World Health Organization, people with mild illness recover in about two weeks, while those with more severe illness may take three to six weeks to recover.

Health officials have urged people to follow good hygiene practices, but also cautioned that large gatherings and unchecked travel can help spread the virus.

Government officials, educational institutions and corporations have grown increasingly wary of large-group events as the new coronavirus continues to spread around the U.S.