NEW DELHI , OCT 25 : Despite being officially certified as polio-free since 2014, India remains at risk of polio reinfection due to vaccine-derived poliovirus (VDPV), its proximity to endemic
NEW DELHI , OCT 25 : Despite being officially certified as polio-free since 2014, India remains at risk of polio reinfection due to vaccine-derived poliovirus (VDPV), its proximity to endemic