Hydroxychloroquine is being tested around the world to see if it can be used as a treatment for the coronavirus pandemic. As the debate intensifies on whether or not it works, 25 percent of physicians around the world believe health care workers should take the drug to prevent COVID-19 infections, according to a new survey. The survey, conducted by Sermo, a health care data collection company, found that one-quarter (5,158) of more than 20,000 physicians around the world believe the anti-malarial drug should be used to prevent infections. Separately, 50 percent of the physicians surveyed have used the anti-malarial drug...