Hydroxychloroquine is an anti malaria and autoimmune prescription drug that has shown effectiveness against viral infections. That versatility placed hydroxychloroquine at the forefront of testing for potential COVID-19 treatments. Studies done in a lab have shown the prescription drug can have a fighting chance against coronaviruses, but these results do not necessarily mean the drug is safe or effective on COVID-19 patients. Still, large observational studies began after the FDA allowed emergency use of hydroxychloroquine on COVID-19 patients. So what have they found?