outbreak. the cdc tracked with the massachusetts health department more than 649 cases that resulted from that weekend. 74% of them were fully vaccinated, fully vaccinated, and most of them had been vaccinated for months. so there was no question of it not having had adequate time to buildup an immune response. i think one of the things we re looking at here is the difference between neutralizing antibody responses, if i can indulge you with a little bit of biology here, versus b-cell memory response. so every single vaccine first trigger neutralizing antibodies. you have these armies, soldiers that come out and attack the enemy, boom, boom, boom. if they re really well made, they go right to the most vulnerable point on the virus, and bam, nail it. no problem. but then as you ve had your second dose and your immune system is fully adapted, it retreats into what s called a