AdvertisementCOVID-19 Threatens Food Supply Chain As Farms Worry About Workers Falling IllMarch 18, 2020Dan CharlesfacebookEmailWorkers pick apples in a Wapato, Wash., orchard last October. U.S. farms employ hundreds of thousands of seasonal workers, mostly from Mexico, who enter the country on H-2A visas. The potential impact of the coronavirus on seasonal workers has the food industry on edge. (AP)