Public health officials in King County, which includes Seattle and is home to over 2.2 million people, have urged local businesses to allow employees to telecommute for the next three weeks in an effort to curb the COVID-19 outbreak.

They are also recommending that higher-risk groups – including people over the age of 60, pregnant women and people with underlying health conditions or weakened immune systems – stay home and away from large social gatherings.

The latest recommendations announced Wednesday came after an employee at Amazon’s Seattle headquarters was confirmed to have tested positive for coronavirus, potentially exposing some 50,000 others who work at the plant.