-The Hindu For India, which has successfully kept naturally-occurring ‘wild' polioviruses at bay for three whole years, a new challenge looms. India is among 140 countries that rely on the oral polio vaccine (OPV). These countries have now been asked to introduce an injectable inactivated polio vaccine (IPV) into their routine childhood immunisation programme by the end of next year. The oral vaccine, which is cheap and easily administered, uses live but weakened...

An oral polio vaccine strain that cannot revert to virulence is needed Wouldn't it be nice to have a better sort of oral polio vaccine? Widespread use of the oral vaccine has brought the eradication of polio tantalisingly within reach. Since 1988 when the world embarked on an effort to wipe out the disease entirely, the number of cases has fallen by 99.8 per cent. Developed by an American scientist, Albert Sabin,...

India has recorded its first case of polio caused by a vaccine-derived poliovirus (VDPV) this year in a five-month-old child in Murshidabad district of Bengal but the country remains free of the wild poliovirus. A polio surveillance laboratory in Calcutta has found that the child from Lalbag block in Murshidabad was infected by VDPV, which occurs when the weakened virus in the oral polio vaccine (OPV) mutates over time, and regains...

-The Telegraph The World Health Organisation has deleted India from its list of polio endemic countries, acknowledging the absence of any new instance of illness caused by the wild polio virus for more than a year since a child was diagnosed with the disease in Howrah in January 2011. “This is the first time in history we’re able to put up a map like this one,” Bruce Aylward, an assistant director-general for...

India seems to have arrived at the threshold of polio eradication, but should it lower its guard? ON January 13, India achieved what had only two years ago seemed impossible in the immediate term. The country, which, given the epidemiological data in the new millennium, had come to be regarded by health experts around the world as one that would be the last to achieve freedom from polio (poliomyelitis), recorded no...