Microsoft is joining the ranks of companies urging its employees to work from home in an effort to help contain the spread of the coronavirus.

In an internal memo The Verge acquired, Microsoft says that “multiple sites” in China are open for business, but undergoing temperature screenings. Telecommuting is already optional in China, as a result of the virus, and mandatory in South Kora. Now, however, Microsoft is expanding optional telecommuting to its San Francisco and Seattle offices.

According to The Verge, “Microsoft is also recommending that those who are feeling sick, have a compromised immune system, or have had contact with someone diagnosed with COVID-19 (the disease caused by the novel coronavirus) should work from home.”

With Seattle being one of the prime areas where the virus is spreading within the U.S., it’s likely Microsoft will continue to make additional adjustments moving forward.