Returning to in-person schooling is both a relief — and a source of great anxiety — for a lot of parents this year. The pandemic is still happening. The Delta variant is surging. And millions of children are too young to get a COVID-19 vaccine. The news changes fast — updates on vaccine trials and breakthrough infections seem to roll in every day — but there's still a lot the whole family can do to stay as safe as possible.In this episode NPR health reporter Pien Huang shares tips from public health experts — all parents themselves — for keeping kids safe at school.