Does hydroxychloroquine prevent the transmission of covid-19?

The covid-19 pandemic has negatively impacted global health and has caused more than 45 000 deaths. Some possible treatments are being tested in randomised trials. Recently, news that chloroquine/hydroxychloroquine has been successfully used to treat pneumonia associated with covid-19 in reports from China and Europe, associated with the panic of transmission has led to a high public demand for these medications in …