that this was going to be a three-dose vaccine. we knew that because we gave the first-two doses so close together. and when you do that, you don't get long-term, durable protection so it was a matter of time before we were going to accept -- expect a third immunization in order to give a really important boost in antibody responses, virus neutralizing antibody and durability of protection. so, we knew this was coming. and then, on wednesday, israelis published in new england journal of medicine an important study showing those 60 years of age who only received two doses were going into the hospital at -- at pretty high rates and lots of breakthrough covid infections. where if they got a third immunization, they -- they did much better and there was a 20% decline in hospitalizations, tenfold decline in cases. so at a minimum, i would have thought they would have brought that down to 60 years of age. and then, today, the centers for disease control in their mmwr,