The concern is the side effects. It can cause heart issues, if there are any underlying heart issures to start with. I don't care if he takes it - I am sure he is freaking out that someone in his office came down with COVID, as Trump is a known germaphobe. Before he became a politician, he didn't like to shake hands with people. It has been prescribed for some people with COVID- but Trump doesn't have COVID- when they decided any potential risks were outweighed by the chance it might work. It will block certain aspects of the virus, but there has not been a large enough peer review study, to say definitively that it works. It's success combined with other medicine is antedotal. But I would ask you this - it has not been shown to prevent COVID, so why would you risk taking it if you DON"T HAVE COVID?