to administer the vaccine to those most at risk of dying: old people. Laura thought that wasn’t right. “She said, ‘It’s young people who have all these social interactions and are transmitting the disease,’ ” recalled her father. “ ‘What if you give it to them?’ ” They went to their model and gave the young people the vaccine, thereby eliminating the ability of young people to transmit the disease. Sure enough, the old people never got it.
