US President Donald Trump says he will be released from hospital later on Monday, four days after being admitted with Covid-19.

Just before a scheduled briefing from his doctors, Mr Trump tweeted he would be leaving at 18:30 (22:30 GMT), adding that he felt "really good".

But questions remain over the seriousness of Mr Trump's illness after a weekend of conflicting statements.

The true scale of the outbreak at the White House remains unclear.

"Feeling really good!" Mr Trump tweeted.

"Don't be afraid of Covid. Don't let it dominate your life. We have developed, under the Trump Administration, some really great drugs & knowledge. I feel better than I did 20 years ago!!"

There are more than 7.4 million Covid-19 cases in the US and the virus has killed nearly 210,000 Americans, according to Johns Hopkins University.

Speaking to reporters on Monday, the president's doctors avoided specifics of his care, but said he was doing well and would receive another dose of remdesivir before being discharged.

The president's discharge comes as more new cases have been reported among White House staff.

At least 12 people close to Mr Trump have now tested positive, as have several junior staff members.

Many of the people who have tested positive around President Trump attended a meeting at the White House on 26 September that is being scrutinised as a possible "super-spreader event".

The White House has not revealed how many staff members have tested positive since Mr Trump's own diagnosis.

Dr Sean Conley, the White House physician, said Mr Trump "may not entirely be out of the woods yet", but that the medical team agreed the president's status and progress "support his safe return home, where he'll be surrounded by world-class medical care 24/7".

He refused to answer questions about when Mr Trump last received a negative test or to go into the specifics of his treatment. He would not offer details regarding the president's scans to check for pneumonia, citing patient protection laws.

Dr Conley did confirm Mr Trump is still on the steroid dexamethasone and has received three doses of remdesivir. He will receive another before discharge and a fifth at the White House.

When asked about whether Mr Trump was safe to travel for campaign events, Dr Conley said: "We'll see."

He also affirmed that he was concerned about his own exposure to the virus while aboard Air Force One.

But Mr Trump's medical team repeatedly emphasised how well the president was doing, in Monday's briefing.

"We remain cautiously optimistic," Dr Conley said, adding that Mr Trump received therapies very early on.

"If we can get through to [next] Monday with him remaining the same or improving, better yet, then we will all take that final deep sigh of relief."

Press secretary Kayleigh McEnany became the latest high-profile figure close to the president to confirm a positive test earlier on Monday.

US media said two other aides to the press secretary had had positive results. Ms McEnany was seen speaking to journalists without wearing a mask on Sunday but said no members of the press had been listed as close contacts by the White House medical unit.

First Lady Melania Trump, senior aides and three Republican senators have also tested positive.

President Trump's diagnosis has upended his election campaign, as he faces Democratic challenger Joe Biden on 3 November.First Lady Melania, who is 50, has been isolating at the White House, reportedly with mild symptoms. In a tweet she said: "I am feeling good [and] will continue to rest at home". (BBC)

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