One of the things that makes it the most dramatic is its capacity to create severe illness in elderlies. We were expecting pandemics like influenza, where you know what type of population the virus is going to attack, which is broad, and, of course, more at the extremity of ages. This particular virus, first of all is sometimes more contagious than influenza, but for some unique reason that is still not understood, it kills elderly. In our nursing homes and long-term care facilities, it's a hecatomb.
It's this interaction between host and virus that we still don't understand, because that would be the explanation for why elderly people are so fragile to this virus.
I think this is why we need to do more research on that, because this is unique.