The packaging and a container of veterinary ivermectin is seen in Johannesburg, South Africa, Friday Jan. 29, 2021. South Africa is allowing the limited use of a medicine to treat COVID-19 even though regulators acknowledge there’s not enough evidence that it works or is safe for this purpose. The South African Health Products Regulatory Authority this week announced the drug ivermectin could be used in exceptional circumstances. Neighboring Zimbabwe also has apparently quietly allowed use of the drug.a. (AP Photo/Denis Farrell)