How many specifically do we need? I think we need to find a few that really work. At the moment, I think the most promising candidates are showing partial efficacy. They are somewhat helpful in this, but we haven't, as of yet, really found a molecule that completely clears infections. The use right now is really limited to getting people more quickly or sooner out of the hospital, but it's not really controlling infection at the moment.
On April 30th, 2020. See this statement in context.