Health experts believe that despite the progress in anti-retroviral drugs for HIV/AIDS it is crucial to have safe a vaccine to prevent the disease. 'There has been incredible progress towards a safe vaccine in the last eight months' Wayne Koff vice president of International AIDS Vaccine Initiative (IAVI) said at a conference here. Benny Kottiri Health Science Administrator and senior researcher at the US Agency for International Development (USAID) said the development of a vaccine was very important for containing the disease. According to V.M. Katoch secretary department of health research efforts to make a vaccine have to be intensified.