Summary: Chronicle health reporter Erin Allday reveals new numbers on the rise of the highly contagious Delta variant of the coronavirus in California. One Bay Area county saw infections triple in the past month. Allday explains why health experts are worried about the strain, which has caused chaos among unvaccinated populations and could set back our immense progress in emerging from the pandemic. Also, Allday discusses the plight of families who have children under age 12 — kids who can’t yet be vaccinated. Learn more about your ad choices. Visit megaphone.fm/adchoices
