Coronavirus: What do we know about the artemisia plant?

Madagascar attracted a lot of attention in April when the African island nation announced it was using a local plant to combat coronavirus. A drink using artemisia plant extracts was promoted by its leader, President Andry Rajoelina. There’s no evidence so far that this plant – whose compounds do work against malaria – can combat Covid-19, according to the World Health Organization (WHO). So what do we know about the plant and its properties?