The president of Harvard University and his wife have tested positive for COVID-19.

In a letter to the Harvard community Tuesday, President Lawrence Bacow said he and his wife, Adele, started experiencing symptoms including a cough, fever and chills on Sunday. They were tested Monday and received the positive results on Tuesday.

Bacow and his wife had been working from home and limiting their contact with others as a precaution since March 14.

Also, Mass. Audubon and the Trustees of Reservations announced they are shutting down their outdoor facilities in line with a state order requiring nonessential businesses to close.