The UK and Ireland had been exempt but Mr Trump said on Saturday: “They’ve had a little bit of activity, unfortunately.”
The total number of confirmed cases in the UK has reached 1, , with (deaths – up from on Friday.
Mr Pence explained that American citizens and legal residents could still return.
Such people would be “funnelled through specific airports and processed “, he said.
Why did Trump take a test?
Speculation over the president’s vulnerability to the virus had grown after he had interactions with least three people who later tested positive.
On Saturday, the 73 – year-old told reporters he had had his temperature taken before stepping into the room and it was “totally normal”.
The White House is now conducting temperature checks on anyone who is in close contact with the president and Mr Pence.
Cost had been a concern for many ordinary Americans considering a test for coronavirus .
More than 32 million people in America have no medical insurance at all, while tens of millions have basic insurance that often only covers a fraction of the cost of any check-ups or treatment.
The authorities have also been accused of being too slow to supply test kits.
which allows the federal government to tap up to $ (bn) £ bn) in relief funds.