Ford was experiencing symptoms “consistent with COVID-19,” Di Marco said in a written statement.
“The hospital continues to monitor his condition, but overall he is feeling well,” said the statement.
Ford said it entered home segregation after receiving a positive test for the new coronavirus.
In a statement released on Tuesday, he said he would work from home and participate virtually in business meetings and city committees.
According to the Prime Minister’s office, Doug Ford has not been in touch with his nephew in the past two weeks.
Meanwhile, Doug Ford and Health Minister Christine Elliott underwent tests on Wednesday afternoon “out of prudence” after being in close contact with Minister of Education Stephen Lecce, who himself is negative for COVID-19.
The pair tested negative for the virus, the Prime Minister’s Office said on Thursday.