Jean-François Delfraissy is a prominent French immunologist and physician known for his expertise in infectious diseases and immunology. He has played a significant role in various health organizations and has been involved in research related to HIV/AIDS and COVID-19. Delfraissy is also the president of the French National Research Agency (ANRS) and has contributed to public health policy in France. In 2020, he was appointed to lead the French Scientific Council, which advises the government on managing the COVID-19 pandemic. His work has focused on understanding the virus and developing strategies to combat its spread, making him a key figure in France's response to the health crisis.