Stefan Hofer's ambulance company, West Traill EMS, in Mayville, North Dakota, has received only one or two calls that weren’t related to Covid-19 over the past two months. But he said the case count has ballooned by 20 to 30 percent because of the pandemic. … Private EMS services, both in urban and rural centers across the country, collectively received $350 million in Covid-19 relief funds in April, but those companies said that money ran out within weeks. Months later, the need remains great as they face another coronavirus surge.