Lineage Logistics, the largest refrigerated warehousing company in the country, is hiring 2,000 additional workers to meet a roughly 30 percent jump in demand in recent weeks. But in the age of social distancing, its hiring practices have changed.

Lineage used to do much of its hiring at job fairs at its 290 warehouses. That’s no longer possible. Instead, Lineage is screening applicants by phone, and asking them if they have been to any coronavirus hot spots or been in contact with anyone who is sick.

Those who advance are invited in for a one-on-one interview and asked to formally apply. But even then, there are extra precautions.

“They get to keep the pen that they filled out their application with,” Sean Vanderelzen, Lineage’s chief human resources officer, said in an interview. “We don’t want it back.”

Lineage is doing much of its hiring from other companies that have done mass layoffs in recent weeks, including some of its customers, like major food service suppliers that have seen their business drop because of the disruption in the restaurant industry.

Dollar General was also making a direct appeal to workers who lost jobs as a result of the sweeping business closings in recent weeks. “For any individual whose job has been temporarily impacted by the effect of COVID-19, we currently have a number of full and part time positions available across our stores, distribution centers and private fleet network,” the company said on its website.