Has this kind of mRNA vaccine technology ever been injected into humans before? Well, this is the first time and the good news is that the results are really, really good. Okay. But in essence, this is an experimental technology. Well, it's a new technology and it is proven in a very large group of clinical trials to be safe and highly effective. Are you completely positive that this new technology is safe? I mean, how can we be sure there won't be long-term effects when these vaccines were seemingly developed so quickly and have only been tested for months and not years? The speed with which it's been done is a reflection of the extraordinary advances in science. And there was no compromise of safety. But as I said before, in the history of vaccinology, you don't see effects that occur years later. Almost all of the bad effects as rare as they are and they are very rare occur between 15 and 45 days from the time you get vaccinated.