State and federal officials say there are simple, everyday steps you can take to avoid catching or spreading respiratory diseases, including COVID-19: Cover your coughs and sneezes, thoroughly wash or sanitize your hands and stay home if you are sick. Get more information from the Centers for Disease Control and Prevention at CDC.gov/coronavirus, or call 211, the Iowa Department of Public Heath's hotline, which is available 24 hours a day, seven days a week.

Nine more Iowans have tested positive for COVID-19, the respiratory illness caused by coronavirus, according to a news release Wednesday from Gov. Kim Reynolds' office.

This brings the total cases in Iowa to 38. The nine new cases also represent the largest single-day increase in positive diagnoses of COVID-19 since it was first found in Iowa on March 8. The prior biggest jump was on Tuesday, with six new cases.

The new cases include three residents of Johnson County; two residents of Polk County; two residents of Dallas County; and one resident each from Washington and Winneshiek counties.

Reynolds also announced a news conference for Thursday afternoon.

Nick Coltrain is a politics and data reporter for the Register. Reach him at ncoltrain@registermedia.com or at 515-284-8361. Your subscription makes work like this possible. Subscribe today at DesMoinesRegister.com/Deal.