OMAHA, Neb. (AP) — The new coronavirus has sickened workers at meat processing plants across the country, forcing some massive operations to close at least temporarily. That’s raising concerns that there could soon be shortages of beef, pork and poultry in supermarkets. The meat supply chain is especially vulnerable since processing is increasingly done at massive plants. That means the closure of even a few big ones can quickly be felt by customers. While company owners promise to deep clean their plants and resume operations as quickly as possible, it’s a difficult task to keep workers healthy given how closely they work together.