"After testing positive, Kimberly was immediately isolated to limit any exposure," said Sergio Gor, chief of staff for the Trump Victory Finance Committee. "She's doing well, and will be retested to ensure the diagnosis is correct since she's asymptomatic but as a precaution will cancel all upcoming events. Donald Trump Jr was tested negative, but as a precaution is also self isolating and is canceling all public events."
Guilfoyle tested positive in South Dakota before she was set to attend the President's event at Mount Rushmore, a person familiar with the matter and a campaign source familiar with the matter said.

Guilfoyle was not with the President and Donald Trump Jr. has so far tested negative, the person familiar with the matter said. That source said Guilfoyle had not had recent contact with the President, but she was in Tulsa, Oklahoma, and was backstage for his rally there and, was also at his event in Phoenix.

The people said Guilfoyle was not seen wearing a mask during the events.

The news of Guilfoyle's test comes not long after Trump Jr. posted images that falsely suggested that masks and face coverings don't help prevent the spread of the highly contagious virus.
Experts say wearing a mask or other face covering could reduce the transmission of Covid-19 by as much as 50%.