Pressure is mounting on U.S. and multinational employers to require COVID-19 vaccines for employees, as the Delta variant spreads voraciously, spiking infections and hospitalizations across the country and forcing employers to once again shutter worksites or change their workplace safety protocols. But can (and should) employers mandate vaccination? Vaccine mandates received strong support on Thursday, July 29 when President Biden announced that all civilian federal employees and onsite contractors either must be vaccinated or submit…