Challenge AIDS in Asia: The Challenge Ahead edited by Jai P Narain; Sage Publications, New Delhi, 2004; pp 395, Rs 295 (paperback). SUNEETHA KADIYALA HIV/AIDS is a global health and development challenge, an impact that will be felt for decades to come. HIV/ AIDS is different. It is a lentivirus and a retrovirus. These two features make it particularly significant for economies and societies. A lentivirus is very slow acting