LAHORE - PM Gilani has convened National Health Conference at Lahore on Monday (today) to devise national strategy to combat dengue virus which has not been brought under control so far despite efforts of the Punjab government. The chief ministers of all the four provinces along with provincial secretaries of health departments would attend the meeting, to be chaired by the PM, at State Guest House at 2 pm. Representatives of National Disaster Management Authority and WHO have also been invited to brief the participants besides Sri Lankan experts who are already in the City.