Several members of Vice President Mike Pence’s inner circle, including at least four members of his staff, have tested positive for the coronavirus in the past few days, people briefed on the matter said, raising new questions about the safety protocols at the White House, where masks are not routinely worn.

Devin O’Malley, a spokesman for Mr. Pence, said that the vice president’s chief of staff, Marc Short, had tested positive. A person briefed on the diagnosis said he received it on Saturday…

The decision by Mr. Pence, who leads the White House Coronavirus Task Force, to continue campaigning is certain to raise new questions about how seriously the White House is taking the risks to their own staff members and the public from the pandemic that has killed more than 224,000 people in the United States. Mr. Short has been among those within the White House who have questioned the extensive lockdowns across the country.