Kolkata, 1 March: India has moved closer to eradication of polio, recording only 42 cases in 2010 compared to 741 in the previous year. Till February this year, only a single case has been reported from Howrah, according to the India National Polioplus Committee of Rotary International. A special polio immunisation campaign was launched recently in Howrah, Kolkata, Murshidabad and adjoining areas by administering oral polio vaccine to the children there. More immunisation campaigns were lined up in these polio high-risk areas as part of rapid response and an aggressive strategy to arrest polio incidence in the state.