Dr. Nandi has extensive research experience in the field of infectious human viruses including HIV, IAV, HBV and natural infection of wild Indian primate species, that involves field work for blood sample collection from wild simians and laboratory-based research. She was among the first 3 authors worldwide to recognize the presence of Unintegrated DNA of HIV-1 as a molecular marker for HIV/AIDS in early 1990's. She is responsible for the identification of 5 novel viruses including HIV-1 like Indian SIVs, IAV-like influenza virus naturally infecting wild Indian primates.