The Department of Health and Social Care DHSC confirmed that Dorries, the Conservative MP for Mid Bedfordshire since 2005 and a bestselling author of fiction, had tested positive for the infection.
The identity of the individual who infected her is unknown. Focus will now fall on tracking down and testing the potentially hundreds of people Dorries will have been in contact with in the past week, both in parliament and at the health department.
She also attended a Downing Street reception last week for International Women’s Day where the prime minister, Boris Johnson, and his fiancee, Carrie Symonds, were among guests present.