Gavin Newsom feared a vaccine nightmare. So he outsourced California’s rollout.

One nagging concern is how Blue Shield will use and retain the personal information it collects as part of the effort. … “That stuff is gold,” said Andrew Noymer, an associate professor of population health and disease prevention at the University of California, Irvine, of personal health information, earlier this month. “Everybody wants to know about your health data.” He said the only personal health data Blue Shield should need is “how many arms have been stuck.”