from the world's big
Nigeria, which accounted for more than half of all polio cases in 2012, reported zero new cases of the infectious disease in 2017.
Australia could soon ban unvaccinated children from attending preschools nationwide.
Australia might soon ban unvaccinated children from attending preschools and daycare. Prime Minister Malcolm Turnbull didn't mince words on the proposed law, dubbed "No Jab, No Play."