Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. WHO Issues Mask-Wearing Guidelines for Children VOA News As millions of children head back to school, the World Health Organization has issued its recommendation on whether they need to wear face masks. The WHO and the United Nations Children's Fund (UNICEF) have broken their new guidelines into age groups, and they say children younger than 6 should not wear them. "According to the limited available evidence, young children may have lower susceptibility to infection compared to adults, however available data suggests that this may vary by age among children," WHO and UNICEF said. .