Smart Living WHO says infants aged under 1 year must not be exposed to electronic screens Updated : April 25, 2019 09:54 AM IST The World Health Organisation (WHO) issued new guidelines for children under five on how they should interact with or avoid electronic screens. In its guidelines to member states, the WHO said children between one and four years old should spend at least three hours in a variety of physical activities spread throughout the day. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.