WHO advises mask usage by children 12 and over

The World Health Organization advises children over the age of 12 should wear masks following the same conditions applied to adults in their country.
For children between six and eleven, the organization advises an analysis if the children are interacting with elderly or how widespread is the outbreak in their region.
Children aged five and under should not, under normal circumstances, wear masks.
The WHO admits little is known about how children transmit the new coronavirus but cites evidence that teenagers can infect others in the same way as adults.