Boris had late last month announced that he tested positive for the novel COVID-19 and had been in self-isolation at his Downing Street residence.
But as he continued to show persistent coronavirus symptoms, he has been admitted based on his doctors advice.
A statement released from the 55-year-old politicians office revealed that his case is not an emergency.
He is reported to be in an NHS hospital in London where he will stay for as long as needed.
“On the advice of his doctor, the Prime Minister has tonight been admitted to hospital for tests. This is a precautionary step, as the Prime Minister continues to have persistent symptoms of coronavirus 10 days after testing positive for the virus.” the statement read in part.
Johnson is the most high-profile world leader to contract the virus. His pregnant partner, Carrie Symonds, said she has been ill with symptoms for a week but was now recovering.