Does ivermectin really prevent COVID-19 infection?

President Rodrigo Duterte adds his voice to advocates promoting ivermectin as a COVID-19 treatment. He hopes the Philippines' own clinical trials will prove it effective. But as Zandro Ochona tells us, the effects of ivermectin differ for several persons who received free samples of the anti-parasitic drug. - The World Tonight, ANC, May 6, 2021