At least 56 coronavirus cases have been linked to a Starbucks in Paju, South Korea. None of the employees, who were wearing masks during their shifts, were infected. At least 56 coronavirus cases in South Korea have been linked to a Starbucks in Paju. Many customers were not wearing masks, and the poorly ventilated space likely contributed to the spread of the virus, local news reports said. But the four employees were not infected, and experts think it's because they were wearing masks during their shifts.