Trump was discharged from hospital on Monday as soon as possible, and posted a video saying that he "learned a lot of knowledge about the new crown"

 Two days after hospitalization, US President Trump, who was diagnosed with the new crown virus, claimed to know more about the new crown than before.

On Sunday afternoon, local time (October 4), Trump updated a video on Twitter, saying, “This is a very interesting trip. I learned a lot about the new crown. And I learned in a real school. Yes-this is the real school, not the kind of school that is based on the script. I understand and understand. I will let everyone know about these interesting things soon."

At the same time, Trump said in the video that he was very grateful to the supporters waiting outside the hospital, calling those who waved the "Trump" banner "great patriots." In this regard, Trump said that he would give his supporters a "surprise": On the eve of the video release, Trump briefly left the Walter Reed National Military Medical Center and waved to the supporters outside the window in the special car without opening the window.

This behavior quickly aroused outside doubts. "This is crazy," Walter Reid's attending physician James P. Phillips wrote on Twitter. "During the completely unnecessary presidential outing just now, everyone in the car had to be quarantined for 14 days. They may get sick, they may die."

White House spokesman Judd Deere responded that the medical team confirmed that it is safe for Trump to greet supporters outside the hospital by car. Deere said that "appropriate protective measures including personal protective equipment are taken throughout to protect the president and all supporters. The medical team believes that this action can be carried out safely.

At the briefing on Sunday that day, Trump’s doctors made an optimistic assessment of his condition, but the medical details they disclosed-such as fluctuations in his blood oxygen level and the decision to start treatment with steroids, It seems that Trump’s condition is more serious.

One of the doctors, Brian Garibaldi, said on Sunday that Trump was in good spirits and could walk on his own without reporting shortness of breath. "If he continues to feel the way he is today, we hope he can be discharged from the hospital and return to the White House at the earliest tomorrow, where he can continue to receive treatment."

But another person named Sean Conley disclosed that since Trump announced that he had tested positive for the new crown virus early on Friday morning, he had a “high fever” on Friday and Saturday, and his blood oxygen level was twice low. At 94%.

Blood oxygen saturation is an important indicator to measure the condition of patients with new coronary pneumonia. The normal reading is between 95 and 100%. At the time of the briefing, Trump's blood oxygen level was 98%, which was within the normal range.

Sean Conley also revealed that Trump took a dose of the steroid dexamethasone. This is a cheap medicine that is common all over the world and is often used to treat arthritis, asthma and some skin diseases. Earlier this year, a large study in the United Kingdom found that the risk of death was reduced by one-third and one-fifth in patients who were connected to a ventilator and who took only oxygen after taking dexamethasone.

The World Health Organization updated its guidelines last month, stating that steroid therapy is recommended for patients with severe new coronary pneumonia, including those who have difficulty breathing and require oxygen therapy. The WHO recommends not to use steroids when treating non-severe patients with new coronary pneumonia.