By , NEW YORK (Reuters) - U.S. states, facing a backlog in administering coronavirus vaccines, are asking medical and nursing students, and even firefighters, to help give the shots and free up healthcare workers battling a raging pandemic at overcrowded hospitals.At least seven state health departments are seeking volunteers for their vaccination sites, some partnering with local universities or nursing schools to offer incentives such as tuition discounts and hands-on training. Others are teaching first responders to administer shots.The national rollout of COVID-19 vaccines are the best...…By , NEW YORK (Reuters) - U.S. states, facing a backlog in administering coronavirus vaccines, are asking medical and nursing students, and even firefighters, to help give the shots and free up healthcare workers battling a raging pandemic at overcrowded hospitals.At least seven state health departments are seeking volunteers for their vaccination sites, some partnering with local universities or nursing schools to offer incentives such as tuition discounts and hands-on training. Others are teaching first responders to administer shots.The national rollout of COVID-19 vaccines are the best...WW…