Amazon.com Inc and Facebook Inc, along with Microsoft Corp., recommended employees in the Seattle area to work from home after several people in the area were infected with the corona virus.
Seattle, Washington State is the most severely affected by the virus in the United States. Ten people have died from 39 infections from the transmission of the virus by the community.
Amazon, headquartered in Seattle, recommended employees in the region work from home by the end of the month after an employee tested positive for the corona virus on Tuesday.
The employee worked in Amazon's South Lake Union office complex in Seattle. Two other employees of the company in Milan, Italy, were also infected.
Facebook announced on Thursday that a contractor at its Seattle office had been diagnosed with the coronavirus and the site would be closed by March 9.
"A contractor in our Stadium East office was diagnosed with COVID-19," said a company spokeswoman in an emailed statement.
Companies' recommendation to work from home affects more than 100,000 people in the Seattle region, since both Microsoft and Amazon each employ over 50,000 people. Facebook has more than 5,000 employees in the region.
The Seattle health authorities have urged companies to allow their employees to work from home as much as possible.
The epidemic has shown no signs of slowing down, and deaths are increasing worldwide. It has killed more than 3,000 people worldwide, mainly in China, where it originated in December.
Large tech companies have also canceled several conferences and canceled corporate events as the virus spreads. Apple and Netflix canceled the SXSW conference scheduled for later this month on Wednesday, citing concerns about viruses.
Microsoft said on Wednesday that some "key" employees should continue to work and that the company would follow government guidelines to disinfect its locations for key employees.
(Except for the headline, this story was not edited by NDTV staff and published from a syndicated feed.)