Dr ##aper : We have vaccines to fight nearly 30 diseases . The world is close to eradicating the polio virus , a disease that once widespread , crippled many . Chatterjee : Myths and myths pose an obstacle to eliminating polio . He says vaccines are most powerful tools to improve public health .
Siddharth Chatterjee : We have vaccines to prevent nearly 30 diseases . The world is close to eradicating the polio virus , a disease that once killed , crippled many . Chatterjee : Myths and misinformation pose an obstacle to eliminating polio . He says vaccines are most powerful tools to improve childhood health .