Bill Gates has already pledged $250 million to the fight against coronavirus, and as he explained to Trevor Noah recently, his foundation is also funding various treatment research programs.

So what progress has been made so far?

In the interview above with Stephen Colbert, the Microsoft co-founder tells the Late Show host about the treatments that he believes are the most promising.

“There’s many that I’m very hopeful about,” Gates says. “The one that is maybe the most promising is taking the blood of recovered patients — the plasma — and then being able to put that back into people who have the disease. That has a reasonable chance of working, and in the next few months we’ll get data about that.”

Gates explains that the amount you need to give people is fairly small, as the plasma can be concentrated down.

“So even in developing countries this is innovation that could be scaled up and could work in a powerful way.”

Elsewhere, Gates also addresses testing capacity, lockdown measures, and the wild conspiracy theories about him on social media.