Tyson Fresh Meats reopened its beef plant near Pasco, Washington, on Tuesday, resuming limited operations after a 12-day shutdown to test workers for COVID-19.

Employees were expected to begin their shifts with a tour to see changes the company has made to keep workers apart and other measures that follow federal guidance for meat and poultry processors, according to the company.

“While the plant was idle, we performed a deep clean and sanitization of the facility and took proactive steps to complement our existing prevention efforts,” Shane Miller, senior vice president and general manager for beef enterprise, said in a statement.

The plant produces enough beef everyday to feed 4 million people, according to Tyson. The company said it shut down the plant because of COVD-19 cases, absent workers and community concerns.

The plant was one of several Tyson plants temporarily shuttered. The coronavirus has curtailed production at a Tyson beef plant in Nebraska and pork plants in Iowa and Indiana.

The Pasco plant employs more than 1,400 workers. Testing them was a “huge team effort,” according to Meghan DeBolt, director of the Walla Walla County Department of Community Health.

“We would like to thank Tyson for continuing to take these measures seriously and putting the safety and welfare of their employees first,” she said in statement issued by the health department and Tyson.

Tyson said it has hired a mobile health clinic to be stationed at the Pasco plant. The company said it has doubled bonuses for workers and increased short-term disability payments until June 30 to encourage sick employees to stay home.