Coronavirus updates: Barron Trump also tested positive for COVID, Melania says

Barron Trump, the youngest of President Donald Trump's five children, has contracted COVID-19, according to an article first lady Melania Trump wrote in an article published on the White House website where she described her experience in the battle against the virus.

Barron has "exhibited no symptoms" and has since tested negative, Melania Trump wrote. It is unclear when he contracted the virus.

The first lady says her own illness came "with minimal symptoms" but adds that they hit "all at once."

"It seemed to be a roller coaster of symptoms in the days after," she wrote. "I experienced body aches, a cough and headaches, and felt extremely tired most of the time."

 Melania Trump has also since tested negative, she wrote. She did not reveal the details of her treatment, but thanked her caretakers and the Americans who wished her well while she was ill.

"Recovering from an illness gives you a lot of time to reflect. When my husband was taken to Walter Reed as a precaution, I spent much of my time reflecting on my family," she said. "For me personally, the most impactful part of my recovery was the opportunity to reflect on many things -- family, friendships, my work, and staying true to who you are."

"Barron's fine," the president told reporters as he departed the White House, making his way to Iowa for another campaign rally tonight

ABC News' Jordyn Phelps contributed to this report.

The number of Wisconsin COVID-19 hospitalizations is at an all-time high, Wisconsin Department of Health Services Deputy Secretary Julie Willems Van Dijk told reporters at a news conference Wednesday.

The state saw an increase of 3,107 cases since yesterday, bringing the total number of confirmed cases in the state to 153,578.

Fifty-seven of 72 counties in Wisconsin are meeting the threshold of very high disease activity levels, Van Dijk said, and every region in the state has one or more hospitals reporting staff shortages.
The death toll in Wisconsin currently stands at 1,536.

ABC News’ Rachel Katz contributed to this report.

France presented a decree on Wednesday announcing a nationwide "state of health emergency" in an effort to contain rising COVID-19 infections.

The new decree will enable the government to impose measures to restrict certain civil liberties. It goes into effect at 12:01 a.m. local time on Saturday.

French President Emmanuel Macron stated that the difference between this declaration and the state of the country in March and April is they "have not lost control." However, infections are rising, and the pressure on hospitals is increasing, he said.

A curfew between 9 p.m. and 6 a.m. will go into effect Saturday and will be in effect for at least four weeks, Macron said. Home gatherings will be limited to a maximum of six people, but schools will not close and travel between regions will not be restricted.

ABC News’ Ibtissem Guenfoud and Christine Theodorou contributed to this report

The U.S. Environmental Protection Agency is moving to focus its efforts to approve disinfectants during the COVID-19 pandemic on a new kind of product that's able to keep a surface virus-free between cleanings or even deactivate viruses days later.

“We do know the primary source of transmission is airborne but we also know that between wearing a mask, washing hands, and social distancing it's also important to clean and disinfect surfaces," Alex Dunn, EPA assistant administrator for chemicals, said on a call with reporters on Wednesday.

The EPA has approved one long-lasting disinfectant called SurfaceWise2, which is currently approved only for use in the state of Texas by American Airlines and Texas Methodist Health Total Orthopedics Sports & Spine Clinics. Dunn said the new process won't require states to submit emergency applications and will make it easier for similar products to be widely available.

ABC News’ Stephanie Ebbs contributed to this report.