Can a drug that kills head lice cure COVID-19 patients? It works in a petri dish, but...

Add a head lice-killing drug called ivermectin to the list of medicines that researchers are testing as a possible treatment for COVID-19 patients. In a petri dish, the medication eradicates SARS-CoV-2 — the virus that causes the disease — in two days, an Australian virologist recently found. But whether it can work safely and effectively in infected humans is not yet known.