That was actually my reaction, too. But I don't think that will go through any ethics commission. Also the immunity will also last for about a year he said. Which is mind-boggling in itself.
Instead we could grow lots of viral particles. Irradiate them to certain death. Then use it to repeatedly challenge the immune system over a long period. Very expensive and nowhere near as effective or reliable as a proper vaccine, but would induce some level of resistance in a fraction of the population.