Dr. Das has made outstanding contributions in the field of Cancer Research, Human Papillomavirus (HPV), Tumor Virology, Human Genetics, Mutation Research. During the last 37 years of his distinguished research career he has published more than 200 research papers in reputed international journals and distinguished himself as a renowned Molecular Oncologist. He established National and WHO Regional HPV Referral Centre for South-East Asia at NICPR.