This story has been updated to include more details about the positive COVID-19 cases in Michigan.

The novel coronavirus case count jumped Thursday in Michigan to 12 people in seven counties, state health officials said.

Ten new cases were reported in adults in Ingham, Kent, Montcalm, Oakland, St. Clair, and Washtenaw counties, who tested presumptive positive for coronavirus disease 2019, known as COVID-19, according to the Michigan Department of Health and Human Services. The specimens will be sent to the Centers for Disease Control and Prevention for confirmation testing.

The cases include:

A woman from Ingham County with history of travel on a cruise.

Two women from Kent County and one man, all with history of international travel.

A woman from Montcalm with history of international travel.

Two men from Oakland County; one with no travel history and one with domestic travel.

A man from St. Clair County with history of domestic travel.

A woman and a man from Washtenaw County; one with history of domestic travel and one with history of international travel.

Those cases are added to two additional Michiganders who tested positive Tuesday, a middle-age man from Wayne County and a middle-age woman from Oakland County.

“We continue to urge Michiganders to take precautions to prevent the spread COVID-19 in our state,” said Dr. Joneigh Khaldun, chief medical executive and chief deputy for health in a statement. “We have to proactively implement community mitigation strategies that will help prevent the spread of the disease, and particularly protect our most vulnerable Michiganders.”

Here is what we know so far about each of the cases:

St. Clair County case

The St. Clair County man with COVID-19 is middle-age, and in stable condition. He took proper precautions early on and had minimal community contact, according to the St. Clair County Health Department, which urged calm.

"The health department does not want the community to panic. If you feel well, you do not need to be tested. Mildly ill people should be encouraged to stay home and contact their health care provider by phone for clinical guidance. Testing will be determined based on risk assessment," Dr. Annette Mercatante, the county medical health officer, in a news release.

Wayne County Case

The middle-age Wayne County man is from Livonia, the City of Livonia announced Thursday, and had traveled within the United States. The city said it's well-prepared and that the outbreak is a call to action for residents to be "hyper-vigilant with personal hygiene practices."

A student at Michigan State University was tested Wednesday for novel coronavirus after being in close contact with the Wayne County man who has the virus.

"I don't know anything about their relationship other than that they were in close enough contact for it to be a concern," said Amanda Darche, a spokeswoman for the Ingham County Health Department. "The student is symptomatic. The criteria for testing is that you be symptomatic. The student is ill and is in isolation.

"I don't know the condition. It is possible to be in home isolation or in hospital isolation. Eighty percent of cases are mild, and I don't know the condition of the student at this time."

It was unclear late Thursday whether the student is among the new Michigan cases.

Oakland County cases

There are now three cases of COVID-19 in Oakland County, two of which were announced late Thursday night.

Both new cases are adult men. One has no known travel history. The other man traveled in the U.S.

The Oakland County Health Division is working to identify close contacts of both men, assessing for risk and determine how to manage people who may have been exposed.

“We must all pull together as a community and implement the stringent mitigation strategies essential to slow the spread of this virus,” Oakland County Executive David Coulter said in a news release issued early Friday morning. “I have instructed county

staff to use all tools available to protect the elderly, support students as schools close, and educate the public on restricting large gatherings.”

The health division released "out of an abundance of caution," a list of places, dates and times when exposure to the virus might have occurred, urging anyone who was at those places to be alert for symptoms of COVID-19. Symptoms include fever, cough, and shortness of breath.

If any develop, health officials suggest staying home and promptly calling a health care provider or hospital prior to arriving so that the appropriate preventive measures can be put in place.

March 1:

Detroit Metro Airport, 9000 Middlebelt Road, Romulus, time and location to be determined

March 4:

Detroit Metro Airport, 9000 Middlebelt Road, Romulus, time and location to be determined

March 5:

Burger King, 27700 Twenty-Three Mile Road, Chesterfield Township, 12:15-12:35 p.m.

White Castle, 27760 Twenty-Three Mile Road, New Baltimore, 12:15-12:35 p.m.

Hobby Lobby, 4715 Twenty-Fourth Ave., No. 100, Fort Gratiot Township, 1:00 p.m.

March 6:

Poole’s Tavern, 157 E. Main St., Northville, 12:30-1:00 p.m.

Five Guys, 3561 Twenty-Eighth St. S.E., Grand Rapids, 6:30-7:00 p.m.

March 7:

Tap Room, 201 W. Michigan Avenue Ypsilanti, 1:00-3:00 p.m.

MSA Woodland, 2100 28th St S.E., Grand Rapids, 12:30-1:30 p.m.

Texas Roadhouse, 3776 28th S.E., Kentwood, 4:30-6:15 p.m.

USA Hockey Arena, 14900 N. Beck Road, Plymouth, 5:30-10:30 p.m.

March 8:

Subway, 6260 28th St SE, Grand Rapids, 11:30 a.m.-12:00 p.m.

Jimmy Johns, 5925 28th St SE, Grand Rapids, 11:30 a.m.-12:00 p.m.

Burger King, 1515 E Grand River Ave, Portland, 3:45-4:00 p.m.

In addition to the two men identified Thursday, a middle-age Oakland County woman who had recently traveled internationally was confirmed Tuesday to have COVID-19.

Dr. Russell Faust, medical director for the Oakland County Health Division, said that when she returned from her trip abroad, she had very little contact with others.

"So she wasn't out in the community," Faust said. "She didn't go grocery shopping. She didn't attend church. She didn't go to the gym or what have you. She didn't go to the mall. So we're fortunate in that, at least this first case for Oakland County, it has low or no community exposure or public health risk associated with her."

And her condition, Faust said, is "very good."

Additionally, Crain's Detroit Business reported that one of the people who tested positive for COVID-19 worked at the Travelers Towers Office complex in Southfield.

A representative for the property management company, Newman Knight Frank, told the Free Press: "Newmark Knight Frank has rolled out a responsive plan and will continue to take proactive measures to help protect the health and safety of our tenants, clients, colleagues and their families."

Washtenaw County cases

The two newly announced cases from Washtenaw County were in people with recent travel, the county officials reported Thursday night.

The woman with COVID-19 was most likely exposed to the coronavirus on a trip to Europe. The man who tested positive had recently traveled to New York, according to the Washtenaw County Health Department.

In addition, at least one person with COVID-19 is being treated at the University of Michigan Medical Center.

Utah Jazz player at Detroit hotel

Detroit Mayor Mike Duggan address questions about the coronavirus at a news conference Thursday afternoon.

Health officials inspected a downtown hotel where members of the Utah Jazz who later tested positive for COVID-19 stayed while they were in town for a game against the Pistons on Saturday, he said.

"It was determined that they had an effective cleaning and sanitizing program," Duggan said.

How to stay safe

Gov. Gretchen Whitmer has declared a state of emergency in Michigan because of the rapidly spreading disease and called for the cancellation of large events and other measures to limit the spread of the virus, which causes symptoms that can range from mild to severe and include fever, cough and difficulty breathing.

COVID-19 symptoms may appear in as few as two days or as long as 14 days after exposure to the virus.

Health officials urge everyone to:

Washing your hands with soap and water.

Avoiding touching your eyes, nose or mouth with unwashed hands.

Covering your mouth and nose with a tissue or upper sleeve when coughing or sneezing.

Avoiding contact with people who are sick.

Staying home if you are sick and contact your health care provider.

If you have symptoms, health officials say it's best to call your doctor and get instructions for what to do. Do not go to the doctor's office or the hospital without calling ahead first.

Kristen Jordan Shamus is a health reporter for the Detroit Free Press and USA Today Network. Contact her at: kshamus@freepress.com or 313-222-5997. Follow her on Twitter @kristenshamus. M.L. Elrick contributed to this report.