The objectives were: To describe the situation of HIV infection and risk behaviours of infection among injecting drug user in three provinces: Hoa Binh, Bac Kan, Tuyen Quang (2009-2010). To evaluate the effectiveness of comprehensive intervention model to prevent HIV transmission among injecting drug users (2011-2013).

Comprehensive investigation on status and changes in fishing practices of migratory fishermen in Cochin backwaters, Kerala was conducted for a period of one year from June 2016 to May 2017.