Considering western UP to be a peculiar case in polio eradication, the WHO and Indian Council of Medical Research will carry out a study to ascertain the level of immunity among the children against the virus following the immunisation programme over the last one year. Experts are of the opinion that for various reasons western UP has become a peculiar case requiring more doses of vaccine than any other part of the world to develop the same level of immunity in a child. The study will be conducted by scientists of ICMR and the ground-level support will be provided by the network of surveillance medical officers working under the National Polio Surveillance Programme of WHO and the Government. "The study is expected to begin by next month ," said Dr S K Pathyarch, regional team leader of the Natioanl Pulse Polio Programme.