@WesPegden @dave_andersen Confounders mean we don't know this. The confounders are often correlated with the the mandates (higher community case rates, more crowded schools, more vulnerability to spread or disease in the community, etc.)
@WesPegden@dave_andersen的混淆意味着我们不知道这一点。混杂因素通常和任务相关（更高的社区病例率、更拥挤的学校、更容易在社区传播或疾病等）