Support WBURBreakthrough COVID Infections Add Even More Chaos To School's Start In 2021Play03:53Download AudioLesley McClurgAugust 23, 2021 ShareStephanie Chenard held hands with her son, Desmond, 8, as they walked to his school in the San Francisco Bay Area last week. Later that evening, the school district reported four COVID-19 cases in four different schools. (KQED)