Sundar Khadka completed his Master's degree in Clinical Microbiology from the Institute of Medicine (IOM), Tribhuvan University Teaching Hospital (TUTH), Kathmandu, Nepal. He worked as a Microbiologist at the HIV Reference Unit, National Public Health Laboratory (NPHL), Department of Health Services, Teku under the WHO HIV DR Surveillance Project for 3 years. He arrived in Japan on October 2, 2018 as a MEXT Scholarship Student to attend the PhD course at Kindai University's Faculty of Medicine.