Tens of thousands of coronavirus (COVID-19) cases have been reported on college campuses across the country. Some leaders are pushing testing as an answer, since a safe and effective vaccine is still months away. Three potential vaccines are in phase 3 of human trials in the United States. READ: University of Michigan to carry out phase 3 of COVID-19 vaccine trialThe Food and Drug Administration (FDA) suggests one could be approved before the trials are over. The White House Coronavirus Task Force just warned Iowa that it has the highest rate of cases in the nation.