491,000 Children Paralyzed Over 17 Years, Indian Polio Vaccine
A new study titled Correlation between Non-Polio Acute Flaccid Paralysis Rates with Pulse Polio Frequency in India has recently been published in the Journal of Environmental Research and Public Health. Using data obtained from the National Polio Surveillance Programme (NPSP) as reported by the Government of India, the findings corroborate well over a decade of research showing a strong link between rates of non-polio acute flaccid paralysis (NPAFP) and India’s oral polio vaccine (OPV) campaign. The incidence of polio acute flaccid paralysis (AFP) in India has decreased. However, the NPAFP rate has increased since 2000.
In 2005 there was a sharp increase, more than doubling, in India’s national NPAFP rate which coincided with the introduction of a high-potency monovalent vaccine. The new vaccine contained five times the number of Type 1 viruses compared to the previously used one. Pulse polio immunization refers to periodically vaccinating all children under the age of five years against the polio virus. The study’s authors previously showed in 2012 that the subsequent ‘pulses’ sharply increased the rate of NPAFP when more than six rounds of pulse polio are used in the year.
“For each round of pulse polio there was an increase of 1.4 cases of NPAFP per under-15 population of 100,000. The highest NPAFP rates were seen in Uttar Pradesh and Bihar, where there was an increase of 2.7 cases of NPAFP per under-15 population of 100,000 for each round of pulse polio.”
via Green Med Info 491,000 Children Paralyzed Over 17 Years, Indian Polio Vaccine