Trump says he's learned a lot about coronary.

Before returning to the hospital, the president passed by a crowd waving the American flag and cheering outside the Walter Reed National Military Medical Centre.

President Trump was detained on October 2nd.

Earlier, Trump through a video posted on the social Twitter network, said he has “learned a lot of” for COVID-19, since infection.

This is the real school, this is not the school to read books. I understand. And it's a very interesting thing”, Trump said.

There have been opinions that once out of the hospital, Trump again showed his willingness to ignore the basic anti - coronary precautions.

This is crazy”, Dr. James P. Phillips, a doctor at Walter Reed National Military Medical Center.

Every person in that vehicle must now be in quarantine for 14 days. They can get sick. They may die”, the doctor wrote.

Earlier, doctors who are leading his treatment said the president's situation continues to improve and he could be released from hospital on October 5th.

Doctors said Trump's oxygen levels had declined twice briefly in recent days, and it is being treated with steroids.

The patient continues to improve. He has no fever since Friday morning, his signs are stable”, doctor Sean Dooley told reporters.

Trump continues to work from the hospital presidential suite, which owns all the equipment that allows him to continue with his official duties.

Trump's infection marks a blow to his re-election campaign and puts the pandemic and previous statements of the president, who had minimized the choreography.

COVID-19 disease has killed more than 200,000 Americans and infected over 7 million.

Meanwhile, the Democrat nominated for president, Joe Biden, again proved negative for the coronavirus, his campaign said.

The results come five days after Biden spent more than 90 minutes in the presidential debate with Trump.