President Donald Trump has tested negative for coronavirus, his doctor revealed Saturday, hours after the White House began temperature checks on staff and reporters who may come into contact with the president.

Trump said that had been tested on Friday night, after fielding questions about it during a press conference due to contact with at least three people who later tested positive for the virus.

On Saturday evening, the president's physician Sean Conley released a letter in which he confirmed the results of Trump's test had returned negative and that he remains 'symptom free'.

Conley claimed in a letter on Friday evening that the president, 73, is low-risk despite his age and his previous contact with people who tested positive.

Yet before a press briefing with the president on Saturday, journalists were screened for a high temperature with one being turned away.

President Trump has tested negative for the coronavirus, his doctor revealed on Saturday evening. The president confirmed he was tested Friday during a press conference, pictured

The letter from Trump's doctor Commander Sean Conley which confirmed his test negative

Brazil's Acting Ambassador Nestor Forster pictured with President Trump and Ivanka. He has since tested positive for the coronavirus becoming the second Brazilian delegate to receive the diagnosis and leading Trump to take a test. Trump's test was negative for the coronavirus

From left: Vice President Mike Pence, President Donald Trump, and Fabio Wajngarten, the communications secretary for Brazilian President Jair Bolsonaro, who tested positive for the coronavirus sparking concerns for Trump. The president has since tested negative

'This evening, I received confirmation that the test is negative,' Saturday's letter from Conley read.

'One week after having dinner with the Brazilian delegation in Mar-a-Lago, the president remains symptom-free.

'I have been in daily contact with the CDC and the White House coronavirus task force, and we are encouraging the implementation of all their best practices for exposure reduction and transmission mitigation.'

Trump's results were met with delight from his family with first son Donald Trump Jr. tweeting: 'Negative!!!'

Trump's surprise claim earlier on Saturday that he had been tested followed a confusing 24 hours in which he first suggested he might get tested, and then released a letter from the White House doctor saying that he was low risk and did not need a test at this time.

Coronavirus tests are usually conducted by nasal swab.

At the briefing on Saturday, all journalists were screened for fevers before entering the briefing room as part of a new policy of checking the temperature of anyone who comes in close contact with Trump or Vice President Mike Pence.

One journalist was reportedly barred from entering the briefing after showing a high temperature.

White House spokeswoman Katie Miller said in a statement that the reporter's temperature was taken three times within 15 minutes, and each time was above the 100.4 degree threshold that the CDC defines as a fever.

A member of the media gets their temperature taken over concerns about the coronavirus in the James Brady Briefing Room at the White House on Saturday

The White House announced earlier in the day that 'out of an abundance of caution, temperature checks are now being performed on any individuals who are in close contact with the president and vice president'.

Pence had been scheduled to lead the briefing but Trump led it off with a surprise appearance, touting his handling of the crisis and taking credit for a massive stock market rally as he delivered a press conference during the last 30 minutes of Friday's trading session.

Contrary to medical advice, the president was seen Friday shaking hands all round as he gathered his coronavirus response team at the White House — a practice he said Saturday owed to long-time habit as a politician but which he said would have to change.

At Saturday's briefing, Trump also revealed that his own temperature had been checked before he entered the room.

On his way out of the room, as reporters asked him what his temperature was, he turned and shouted, 'totally normal!'

Trump said Friday he'd 'most likely' get tested for the novel coronavirus, as he was grilled on his recent contacts with several members of a visiting Brazilian presidential delegation who have since tested positive.

On his way out of the room, as reporters asked him what his temperature was, he turned and shouted, 'totally normal!'

A member of the White House physicians office (left) checks temperatures of media members before the briefing as part of a new policy to screen those near Trump for fevers

Members of the media lined up to have their temperatures checked before the briefing

On Friday, Brazil's Acting Ambassador Nestor Forster tested positive for coronavirus, making him the third person who visited Mar-a-Lago with Trump last weekend to be confirmed with the virus.

A letter from Conley sent on Friday night revealed that Trump had dinner with Forster on March 6 and both the president and his daughter Ivanka are pictured on the evening with the ambassador.

The president also came into contact with Brazilian Press Secretary Fabio Wajngarten on Saturday who tested positive and he attended a dinner on Sunday after which one of the attendees was also diagnosed. It's not clear who that attendee is.

Forster was the third person over the space of a weekend that Trump and members of the first family encountered who have since tested positive for the deadly coronavirus.

Ivanka has now had several brushes with the coronavirus including with Australian Home Affairs Minister Peter Dutton days before he tested positive.

She stayed home on Friday but is showing no symptoms, does not need to self-quarantine and stayed home out of an abundance of caution, the White House said.

President Trump said he might get tested at a press conference on Friday

A letter from Trump's doctor who insisted that he does not need to be tested

When asked if he would be tested, Trump said: 'Most likely, yeah, most likely. Not for that reason. but because I think I will do it anyways.'

However in a letter last night, Conley said that Trump still remains low risk and does not need to be tested - suggesting a change of heart in the administration.

'This evening, we learned of another dinner guest, this one sharing the president and the White House delegation, who was symptom-free until this morning and has since tested positive for COVID-19,' the in-house physician said in a letter of Ambassador Forster's diagnosis.

TRUMP'S BRUSH WITH CORONAVIRUS AT MAR-A-LAGO Friday, March 6: Trump and Ivanka have dinner with Brazil's Acting Ambassador Nestor Forster who tested positive Friday Saturday, March 7: Trump and Mike Pence are pictured with Brazilian Press Secretary Fabio Wajngarten who tested positive Sunday, March 8: A guest who attended a Trump Victory dinner at which Trump delivered remarks tested positive Trump is also pictured shaking hands with Brazilian President Jair Bolsonaro has been tested twice Advertisement

'The president's exposure to the first individual was extremely limited (photograph, handshake) and although he spent more time in proximity to the second case, all interaction occurred before any symptom onset.

'These interactions would be categorized as LOW risk for transmission per CDC guidelines, and as such, there is no need for home quarantine at this time.'

Trump has now been near three people within three days who have tested positive for the virus sparking further concerns that he may have been exposed.

These worries have now been set aside with his negative results.

The first Brazilian patient Trump was confirmed as meeting last weekend was Wajngarten who is pictured with both Trump and Mike Pence sporting a 'Make Brazil Great Again' hat last Saturday.

A second person who visited Mar-a-Lago last Sunday also tested positive for the coronavirus on Friday as President Trump declared a national emergency over the pandemic and announced that he would get tested.

Ambassador Forster's diagnosis was the third.

The Brazilian government confirmed Forster's diagnosis in a tweet: 'Brazil's Chargé d'Affaires Ambassador Nestor Forster has learned tonight that he has tested positive for Covid-19. Following medical advice, Amb. Forster will extend his self-quarantine, which he had already placed himself into as a precautionary measure, for another two weeks.'

Public life in the United States has come to a halt as cases rise over 2,600 and the death toll hit 52 but Trump and the first family continue to resist going into self-isolation.

President Donald Trump shaking hands with Brazilian President Jair Bolsonaro during a dinner at Mar-a-Lago on Saturday night; Bolsonaro's condition is claimed to be negative on a second test, after it was positive on a first one

Trump said in a press conference Friday that he would get tested but not because he stood beside the Wajngarten on Saturday but 'because I think I will do it anyway'.

The president continued to ignore public health experts advice throughout the conference and shook hands, patted backs and touched his microphone 31 times.

News of the second and third cases were only revealed following the press conference.

'I'M NOT TAKING PRECAUTIONS AFTER BOLSONARO DINNER,' SAYS TRUMP The president said he wasn't taking precautions after Brazil's president Jair Bolsonaro, who he had dinner with Saturday night at Mar-a-Lago, was tested for the disease. Bolsonaro's first test was positive but a second test came back negative. Bolsonaro's press aide also tested positive and he posed with Trump. The president is a clinically-obese 73-year-old. 'No. We have no symptoms whatsoever,' he said. 'And we had a great meeting with the president of Brazil. 'Bolsonaro, great guy. Very tremendous,' he said. 'He's doing a fantastic job for Brazil. And, as you know, he tested negative - meaning nothing wrong - this morning and we got that word, too. Because we did have dinner with him. 'We were sitting next to each other for a long period of time.' Advertisement

The news of the second case was revealed through an email from Republican party officials sent to other guests present at the president's private estate last weekend.

'If you or any of your loved ones is ill or develops a fever, shortness of breath, or other respiratory symptoms, please contact your medical provider,' the email read.

The second diagnosis involved a guest of a donor who was not in contact with Trump, according to the Washington Post.

It is not known whether the individual has developed COVID-19, the disease caused by the virus.

The president announced the hurried press conference Friday after reports out of Brazil said the President Jair Bolsonaro tested positive for coronavirus.

One of the major newspapers in Rio de Janeiro, Journal O Dia, reported the news of Bolsonaro's positive test.

Bolsonaro, 64, was checked for the disease after his aide Wajngarten tested positive for it.

But a second test that came back on Friday showed the president tested negative, according to a statement on Bolsonaro's official Facebook page, which is adding to the questions and confusion.

'The Armed Forces Hospital and (diagnostic laboratory) Sabin have returned a negative test result for COVID-19 for the President of the Republic Jair Bolsonaro,' the posting said.

It was accompanied by a photo of Bolsonaro flashing an obscene arm gesture at the press.

On Thursday, Trump brushed aside concerns about his encounter with the Brazilians - just one in a series of brushes the president has had with the highly-contagious disease.

Both Bolsonaro and Wajngarten, his press secretary, were at Mar-a-Lago on Saturday night. Wajngarten had his photo take with President Trump and Vice President Mike Pence.

The third case Ambassador Forster is potentially the most risky for Trump as they spent a dinner sitting at the same table.

Donald Trump announced a state of national emergency in the Rose Garden at a hastily organized press conference Friday but continued to ignore public health experts advice and touched his mic 31 times during the conference, shaking hands and patting backs

President Jair Bolsonaro, right, along with his Press Secretary, Fabio Wajngarten (second from left, partially obscured), during a meeting with US President Donald Trump at the Mar-a-Lago residence last weekend. The meeting sparked fears Trump encountered the coronavirus

Trump and the first family have resisted going into self-quarantine despite other lawmakers who came into contact with those testing positive for the disease going into voluntary isolation.

The Centers for Disease Control and Prevention recommends testing if you 'have been in close contact with a person known to have' the virus. The agency defines close contact as 'being within approximately 6 feet (2 meters) of a COVID-19 case for a prolonged period of time.'

Also, according to CDC guidelines, the president would be considered 'medium' risk for exposure.

Other world leaders are self-quarantining. Canadian Prime Minister Justin Trudeau is in a voluntary 14-day quarantine after his wife, Sophie, tested positive for the disease.

Several members of the first family were at the Winter White House Saturday night where there was a birthday party for Kimberly Guilfoyle, the girlfriend of Donald Trump Jr., in addition to the working dinner for the Brazilian delegation.

One of those was Ivanka Trump, who, it was revealed late Thursday, had another brush with the disease.

She and Attorney General Bill Barr posed for a photograph with Australian Home Affairs Minister Peter Dutton on March 5 - days before he tested positive for coronavirus.

Ivanka Trump stayed home on Friday but is showing no symptoms, does not need to self-quarantine and stayed home out of an abundance of caution, the White House said.

'The White House is aware that Mr. Dutton tested positive for COVID-19. He was asymptomatic during the interaction. Exposures from the case were assessed and the White House Medical Unit confirmed, in accordance with CDC guidance, that Ivanka is exhibiting no symptoms and does not need to self-quarantine. She worked from home today out of an abundance of caution until guidance was given,' White House Deputy press secretary Judd Deere said in a statement.

Dr. Anthony Fauci, the nation's top infectious disease expert at the National Institutes of Health, said he would 'likely' have been tested after coming if he had come into contact with Bolsonaro's aide who tested positive for the coronavirus.

When asked hypothetically if he would get a test, he told ABC's 'Good Morning America': 'Likely I would, but I'm not sure.'

'It depends on the circumstances,' he added.

Wajngarten, the Bolsonaro aide who was at Mar-a-Lago for Saturday's dinner and the birthday party, tested positive for the virus, setting off a chain of events on Thursday, including a test for his boss. Brazil has at least 73 confirmed cases of coronavirus and zero deaths thus far.

MARCH 7: Trump, Brazilian president Jair Bolsonaro with President Trump, National Security Adviser Robert O'Brien, and Ivanka Trump at a working dinner at Mar-a-Lago

The weekend's encounter was just the latest brush Trump has had with the coronavirus. An attendee at CPAC, the annual conservative conference that the president addressed at the end of February, tested positive for the virus.

The American Conservative Union, which sponsors the conference, was quick to say the person had no direct contact with Trump or Pence, who also spoke.

But three lawmakers went into self-quarantine because they did and all had contact with the president: new White House Chief of Staff Mark Meadows, Rep. Doug Collins and Rep. Matt Gaetz.

Gaetz was also at Mar-a-Lago on Saturday night for the dinner and birthday party. Additionally, the Florida Republican flew back to Washington D.C. with the president on Air Force One on Monday.

Trump did not hesitate to spread germs Friday by repeatedly shaking hands during his coronavirus press conference, breaking the CDC's guidelines on how to avoid contracting the deadly virus.

But Trump wasn't the only one to flout the safety guidelines. Vice President Mike Pence, members of the coronavirus task force and CEOs adjusted the same microphone when they came to speak at the podium.

Meanwhile, members of the media were all packed into the audience and sitting in shoulder-to-shoulder to hear Trump's declaration of a national emergency, disregarding the call for social isolation.

There were at least 15 people, including the President and Vice President, gathered around the podium in the White House Rose Garden for the press conference.

At one point, Trump shook hands with Brian Cornell, Chairman and CEO of Target Corporation, even after Cornell was seen coughing in his hand.

He also shook hands with Doug McMillon, president and CEO of Walmart, during the news conference.

When Dr. Anthony Fauci, Director of NIAID, approached the podium to speak, he and Trump both adjusted the microphone and their hands overlapped.

Dr. Fauci was also seen touching his face throughout the press conference.

Dr. Deborah Birx, White House coronavirus response coordinator, and Mike Pence could also be seen with their bare hands on the podium.

Donald Trump held a press conference in the White House Rose Garden Friday where he repeatedly shook hands. Seen shaking hands with Brian Cornell, Chairman and CEO of Target Corporation

CVS Executive Vice President Thomas Moriarty was also among the CEOs to shake hands with President Trump

When Dr. Anthony Fauci, Director of NIAID approached the podium to speak, he and Trump both adjusted the microphone and their hands overlapped

Trump went in for a handshake as Bruce Green, Executive Vice President and Chief Strategy and Innovation Officer of the LHC Group, offered his elbow instead

But Bruce Greenstein, Executive Vice President and Chief Strategy and Innovation Officer of the LHC Group, did take precaution by offering his elbow when President Trump when in for a handshake.

The president responded the elbow bump with: 'Oh okay, I like that. That's good.'

Trump's national emergency declaration will allow him to access $50 billion in emergency funds.

'The action I am taking will open up access to up to $50 billion of very important and a large amount of money for states and territories, localities in our shared fight against this disease. Furtherance of the order, I'm asking every state to set up emergency operations centers immediately,' Trump said.

He spoke on a day when questions mounted about whether he has been infected with the virus himself, with his daughter Ivanka in self-isolation - and as markets suffered yet another wild ride.

'I'd like to provide an update to the American people on several decisive new actions we're taking that are very vigilant effort to combat and ultimately defeat the corona virus, we've been working very hard on this. We've made tremendous progress,' he said.

'Europe was just designated as the hotspot right now. We closed that border awhile ago. That was lucky, through talent or luck, whatever you want. But through a very collective action and shared sacrifice, national determination, we will overcome the threat of the virus.

'Like our earlier, very aggressive actions with China this measure will save countless lives.

'To unleash the full power of the federal government did the separate today I am officially declaring a national emergency - two very big words,' Trump said.

'The action I am taking will open up access to up to $50 billion of very important and a large amount of money for states and territories, localities in our shared fight against this disease. Furtherance of the order, I'm asking every state to set up emergency operations centers immediately,' he added.