Hillary and Bill Clinton have wished President Trump and his wife a "speedy recovery" in separate tweets.

In 2016, Hillary was beaten by Trump in one of the most bitterly fought elections ever.

Image source, Getty Images/BBC

President Donald Trump's coronavirus diagnosis comes after a busy week running his administration and campaigning ahead of the 3 November election, during which time he has interacted with many high-level officials.

The president announced positive test results for himself and his wife, Melania, in a tweet on Friday, at around 01:00 local time (5:00 GMT).

This followed a positive diagnosis for his close aide, Hope Hicks, who reportedly started feeling symptoms on Wednesday and tested positive the next day.

It takes five days on average from the moment a person is infected for symptoms to start showing, but it can be much longer, so the World Health Organization advises a 14-day isolation period.

The peak infectious period for the virus is the day before symptoms appear and the two days after, although a large proportion of people never show any symptoms at all. The White House says it has begun contact-tracing.

Here is a look at some of the people we know Trump has crossed paths with in the last week.

Trump's daughter, Ivanka, has called her father a "warrior" in a tweet.

Republican Senator Thom Tillis has tested positive for coronavirus.

Tillis, of North Carolina, is the latest high profile US politician to test positive for Covid-19.

He attended President Trump’s announcement of his Supreme Court nominee Amy Coney Barrett on Saturday.

With weeks to go until the 3 November presidential election, US voters must now process the president's positive Covid-19 diagnosis.

We asked some older members of our voter panel for their reactions to Trump's test.

Eric, Trump-supporter turned Biden voter: Covid is not a Republican issue, it's not a United States issue, it's a global health issue. The president never [listened to] the medical experts, let alone the fact that he totally blew off first protecting the country. So, it's sad - I'm just very sad for him and his wife and I hope they recover, but that’s not gonna change who I vote for.

Jim, Trump supporter: My first reaction was, obviously, it's very unfortunate. My second reaction is wondering what his opposition is going to do, to try and leverage this into making him look bad again. We have to remember that we have the benefit of hindsight. It's an incredibly complicated situation when you look at it from a national standpoint. Given that, I don't think anybody could have done any better.

Mark, Biden voter: I am very concerned when anyone gets a diagnosis of being Covid positive - being someone my age and my size, I know how bad that can be for them. Hopefully [this will be] his way of having to learn how leaders need to respond to threats. I don’t think he underestimated the crisis. I personally think he mismanaged.

Kathleen, Trump voter: I hope they do well. But my brother also caught it and he said he's had flus that felt worse. It's just a reminder that [Covid-19] is not something anyone should take for granted. But you can't be paranoid. It’s not like back in April, when a complete shutdown made sense because we didn’t know what we were dealing with.

A spokesman for the Trump campaign has said it will not be removing negative TV adverts about Joe Biden, the president's rival in next month's election.

It comes hours after Biden’s campaign said they would pull all negative adverts about Trump after the president tested positive for Covid-19 and was hospitalised.

"Joe Biden used his speech in Michigan today to attack the President repeatedly on Social Security, the economy, and job creation,” Tim Murtaugh told CNN.

“Now Biden wants credit for being magnanimous?”

James Gallagher
Health and science correspondent, BBC News

Image source, Getty Images

Donald Trump has clear risk factors - including his age, weight and being male - that all raise the chances of a severe coronavirus infection.

He is 74 and has a Body Mass Index (BMI) over 30, which is the clinical definition of obesity.

But it is dangerous to speculate about how the virus will affect any individual person.

The health of any two 74-year-olds can be wildly different, and other medical conditions massively alter how big a threat this virus poses.

Read more here.

Katty Kay
World News America presenter

Image source, Reuters

In retrospect we shouldn’t be surprised by any of today’s news.

There is a pandemic, the president is in close proximity to many people every day, he doesn’t follow his own government’s guidelines and other people in the White House have caught the virus.

As one former White House official put it to me this afternoon, the only really surprising thing is that it didn’t happen earlier.

And yet, I still can’t quite believe that the president was helicoptered from the White House to a hospital suffering from Covid-19.

It feels as if everything has been thrown in the air, in what was already a tornado of a campaign season.

I don’t know what the fallout will be. I do know there has never been an election like this one

Many social media users are pointing to the time - almost exactly four years ago - that Trump mocked Hillary Clinton for having pneumonia.

"She can't make it 15 feet to her car? Give me a break," he said in October 2016.

Just over a month later he won the presidential election.

Image source, Reuters

Brazilian President Jair Bolsonaro has wished President Trump a “rapid recovery”.

He shared the message on Facebook late on Friday.

“I wish for a rapid recovery for the president of the USA, Donald Trump, and the first lady Melania,” he said.

"With faith in God, they will soon recover and the work of managing the country and his re-election campaign will not be affected."

Mr Bolsonaro contracted coronavirus earlier this year. His case was mild with a few symptoms.

Image source, Getty Images

Questions have been raised about Donald Trump's decision to attend a fundraising event at his golf club in New Jersey, after one of his closest aides, Hope Hicks, tested positive for coronavirus.

The BBC spoke to Joe Piscopo, a comedian and local radio host, who attended the event in Bedminster.

"We were all outside, adhering to the [government] guidelines," said Mr Piscopo, noting that Trump give a speech in the club's outside portico.

"I didn’t see anybody close to the president, apart from the secret service of course,” he added.

The New York Times had earlier reported that Trump came into contact with more than 100 people at the fundraiser.

Twitter has said it will suspend users who wish death upon the president.

“Content that wishes, hopes or expresses a desire for death, serious bodily harm or fatal disease against an individual is against our rules,” Twitter said in a statement, external to Vice's Motherboard site.

The social media giant referred to an “abusive behaviour” rule that’s been in place since April.

On the other hand, Facebook's rules "distinguish between public figures and private individuals" and appear to allow people to wish death upon Trump so long as they do not tag him or "purposefully expose" him to "calls for death, serious disease, epidemic disease, or disability".

Image source, Reuters

Former President Barack Obama has extended his best wishes to the president during a virtual fundraiser.

Speaking about Mr Trump and First Lady Melania, he said: “Michelle and I are hopeful that they and others who have been affected by Covid-19 around the country are getting the care that they need, that they are going to be on the path to a speedy recovery.”

Mr Obama said it was important to remember even though there is a presidential campaign on, that “we’re all Americans and we’re all human beings and we want to make sure that everybody is healthy”.

He was speaking during a virtual fundraiser with vice-presidential nominee Kamala Harris.

Her debate with Vice-President Mike Pence scheduled for Wednesday is still expected to go ahead..

James Clayton
North America technology reporter

Image source, Reuters

Joe Biden’s campaign has said they will pull all negative adverts about President Trump.

Our US partner, CBS, said his team were "in the process" of pulling such adverts and it would be for a "to-be-determined time".

Biden removing negative ads from Facebook is a bit of a moment.

It’s the surest sign yet that this election has now completely changed.

Some of the ads removed included claims that Trump has been “The worst President America has ever had”.

Biden spent $42m [£32m] last week on advertising. Nearly $6m was spent on Facebook.

It’s believed the decision was made this afternoon - before Trump’s hospitalisation was announced.

It’s likely we’ll now see the entire advertising and campaigning strategy fundamentally shift.

Biden is going to have a walk a line between seeming caring and conciliatory whilst still getting his messaging out.

That’s a difficult line to tread.

Donald Trump, who has now arrived at hospital, has posted a video on Twitter thanking people for their "tremendous support".

It is the first time the president has posted on the platform since announcing he and his wife Melania tested positive for coronavirus.

White House communications director Alyssa Farah has said the president has not transferred his powers to Vice-President Mike Pence.

"The president is in charge," she said.

White House deputy press secretary Judd Deere added, “Absolutely not,” when asked if there would be a transfer, CNN reports.

Image source, Reuters

North Korean leader Kim Jong-un has sent a letter to President Trump wishing him well, according to North Korean state media.

Mr Kim said he “sincerely hopes” the president and his wife will recover as soon as possible.

Mr Trump became the first serving US president to step into North Korea in 2019.

Image source, Reuters

Donald Trump has just left the White House in his official helicopter for the Walter Reed Military Hospital.

The journey is expected to take around 10 minutes.

The president did not talk to journalists but waved before entering the helicopter.

The US leader's official helicopter - Marine One - is at the White House, ready to take the president to Walter Reed Military Hospital.

Image source, Reuters

Image source, Reuters

President Trump's son Eric has described his father as a "true warrior".

He called on people to pray for his father's recovery.