and phase three, does it work on a large scale? tens of thousands of volunteers are given the vaccine to check for adverse reactions, which could be rare, but important when trying to vaccinate the entire world. russia only went to phase two and declared victory. >> i don't find it acceptable that you take shortcuts, injecting lots of people with materials that have not been really well documented for efficacy and safety is not something that would be acceptable here. if we would try to do that, it would be not only unethical, but also it would deter people from being vaccinated. >> if i didn't believe in the vaccine, if i didn't understand the science behind it, i would never have injected myself with it. >> kirill dmitriev is the head of a russian state-controlled investment fund. he's part of putin's inner circle, and he's the pitch man