Coronavirus is putting colleges and universities to the test -- when to open, how to open, how to keep students safe.|| Coronavirus updates | Maryland's latest numbers | Where to get tested || Towson University is one of the latest forced to adjust its fall semester plan.One public health expert told 11 News Tuesday, “A lot of this we're learning on the fly," a reference to all the various changes going on at campuses around the country as colleges begin to reopen. What's there best testing strategies, precautions -- all of it creating a lot of uncertainty for parents.Bettina McDavid's daughter just started her freshman year in college at Miami University, in Ohio, at home online. The school delayed her move onto campus. “At this point, we are hoping she is going to move in Sept. 18, and I think the school is waiting to see what is happening on all these other campuses,” McDavid said. Almost daily, colleges and universities are adjusting opening plans and taking other measures forced by the coronavirus pandemic.Towson University temporarily moved to online instruction this week after 55 students tested positive for the virus.The mayor in Tuscaloosa, Alabama, closed bars for two weeks after more than 500 students tested positive at the University of Alabama.“We are going to learn a lot during the startup of campus life all over the country, whether testing of students at regular intervals makes sense or maybe random sampling, so you have some understanding of how prevalent this virus is on your campus,” said Dr. Amesh Adalja, of Johns Hopkins Center for Health Security.Adalja said campuses need a consistent testing strategy.“What I think at minimum is you have to have a testing plan that expedites testing of those individuals that are symptomatic that has to be in every plan for every college across the country. So we don't have people who are infected not knowing they are infected,” Adaljia said. “It's been very difficult given that this graduating class of 2020. It's been one letdown after the next,” said Meghan Brody.Brody's daughter has also been delayed in moving on campus at the University of Delaware. She expects a lot of uncertainty the next few weeks.“I would be hardpressed to think a lot of colleges won't be sending their kids home in the next few weeks to a month when everything gets opened up,” Brody said.One footnote, which could impact the spread of coronavirus on campuses. According to Adalja, coronaviruses tend to accelerate their transmission in colder, less humid weather.