A British woman has died in a London hospital of a suspected case of pneumonia.
The London ambulance service said the woman, aged in her 40s, was found unconscious at about 11am.
She was taken to hospital and pronounced dead shortly after.
A post-mortem examination is due to take place later on Thursday.
On Tuesday, a British man was found dead after he was found in a bathtub in his home, and later died in hospital.
“This is a tragic and extremely unfortunate incident that has been deeply upsetting to all of us at Cambridge University and our university community,” the university said in a statement.
Catherine Russell, the dean of students, said it was “a shocking and tragic situation” and said the university was “working closely with the authorities and the coroner”.
Russell also said the hospital had a “zero tolerance” policy for anyone to come into contact with the woman and her daughter in the early hours of Thursday.
“It’s not acceptable for anyone in our community to come in contact with her or their daughter, and it is unacceptable for anyone with her history of medical problems to come near them,” she said.
Russell said the “unexpected” nature of the incident was compounded by the fact that Russell was the mother of a member of staff.
An investigation into the incident is underway.
Cambridge International Exams has cancelled its annual examination for a period of six weeks.
University of London said its medical examiner would also hold a review of its procedures following the death.
Exams in other countries will continue as normal, it added.
UK Prime Minister Theresa May said the UK was in contact “very closely” with Britain’s medical and coronavirus response.
In the UK, authorities said the man was “in good health and had no medical or infectious history” and had not been known to be a public health risk.
He had not yet been formally reported missing, a police spokesman said.