A nationally representative survey in Spain found only slightly lower prevalence of the virus that causes Covid-19 in children under 10 compared to older children and young adults.
And according to recent data from the ONS infection study, which randomly samples the population each week, infection rates in England were highest in older teens and young adults, while the rate of infection among younger children was no different to that of adults.
Although schools have already implemented some important precautions, other tools are still under-utilised. Measures such as better ventilation and universal masking are crucial. Opening windows even a few centimetres can increase the air exchange that dilutes virus-laden aerosols, while portable air cleaners with Hepa filters can capture airborne viral particles. And getting students outside as much as possible, including using tents or other structures, can also help mitigate indoor risks.