With U.S. infections rising for several weeks, Trump became one of the tens of thousands of Americans who test positive each day.
Trump's doctor said that the President felt fatigued and that he had been given an experimental treatment aimed at staving off a severe case of COVID-19.
Most infected children have mild cases; hospitalizations and death rates are much lower than in adults.
Trump also suggested the virus would disappear without a vaccine, claiming the nation would develop a herd immunity with time, but he didn't mention the lives that would be lost along the way.
However, experts including top US government infectious diseases doctor Anthony Fauci say vaccine approval is more likely toward the end of the year.
The blood plasma, taken from patients who have recovered from the coronavirus and rich in antibodies, may provide benefits to those battling the disease.
Public health experts say virus rates in the community should be low, but there's little agreement on a specific threshold or even a measurement.
New Zealand had been hailed as a global success story after eradicating local transmission of the virus and Ardern was lauded as the "anti-Trump".
Alex Azar says China's ruling Communist Party had the chance to warn the world and work with the world on battling the virus.
France and Germany are now imposing tests on arrival for travelers from "at risk" countries, the U.S.included.
Health officials reported this week that 15 adults were poisoned in Arizona and New Mexico in May and June after drinking hand sanitizer.
NIAID Vaccine Research Center (VRC) scientists worked with investigators from the University of Texas at Austin to identify the atomic structure of the spike protein on the surface of the coronavirus.
The US is the worst-hit country from the pandemic with over 4.7 million cases and more than 155,000 deaths.
Trump, at a White House news conference on Thursday, told reporters that he took the decision owing to a spike in coronavirus cases in Florida.
Some labs are taking weeks to return COVID-19 results, exacerbating fears that asymptomatic people could be spreading the virus if they don't isolate while they wait.