The conversation in regards to Mutaf has derailed into a pissing match, but I think I can offer some insight, as I work with international students who often attend university in the U.S.
1. The absence of international students to campuses throughout the U.S. would have major financial ramifications. The "U"'s undergraduate student population is comprised of 5% international students, which works out to 2550 students. The vast majority of intl. students are "full pay" students, meaning they aren't accessing any financial aid-a major reason that they're so enticing (of course, there's several other reasons, but my cynical/pragmatic side recognizes this is the most significant). So, those 2250 undergrads paying full tuition of $33,000/year? That's a big chunk of money. If they live on campus, you add in fees, books, etc.-a much bigger impact on the "U"'s ledger, and that's only undergrads.
Many smaller, liberal arts colleges are already feeling the squeeze of all these factors and we're already seeing the shuttering of doors with coronavirus being the nail or nails in their coffin.
2. The flow of students out of the U.S. to other countries is minuscule when looking at higher ed. A quick search stated that US students studying overseas was roughly 340,000 students in 2017-18. Over a million international students come to study in the U.S. each year, and unlike with the U.S. students, they tend to stay to complete degrees rather than do a study abroad semester.
3. This new "policy" about new international students not being allowed to enter the U.S. is much to do about nothing at this point. Google just about any country's US Embassy page and see what it says about getting an appointment to obtain passports to the States. These kids/students are in limbo, due to those offices not being open. Long before this recent posturing, students were receiving messages from universities that they should not plan on being on campus for first semester, due to the likelihood they would not obtain their visas in time, and they'll need to aim for second semester entry.
4. Finally, don't believe a damn thing you're hearing from China. I lived there for three years and the amount of suppression of information was incomprehensible to me until I experienced it. Western journalists aren't getting anywhere near the reality of what was happening in Wuhan, I think the early reports that we saw from there were due to the government being taken by surprise at its rapid spread, otherwise they would have squashed that news in a heartbeat. And they're not above wiping out their people if they feel it's expedient.