Not zero, but so incredibly low as not to be matter for concern in terms of risk assessment. One of the few upsides of this pandemic is that young children are

Not zero, but so incredibly low as not to be matter for concern in terms of risk assessment. One of the few upsides of this pandemic is that young children are the least affected, and with vaccines available for ages 5 and up this risk is well mitigated for older children (teens in particular).