DES MOINES — Health officials report the number of coronavirus cases in Iowa grew by 543 to 28,478 on Sunday.

The Iowa Department of Public Health said that as of 10 a.m. Sunday the number of deaths linked to the virus remained at 704, which was unchanged from Saturday.

The state said 17,573 of the people who tested positive for the virus in Iowa have recovered. A total of 295,920 people have been tested.

For most people, the coronavirus causes mild or moderate symptoms, such as fever and cough, that clear up in two to three weeks. For some, especially older adults and people with existing health problems, it can cause more severe illness.