Knowledge festival, an international online conference on Traditional Medicine during 16- 22 August 2021, was organized by Open Attempt Organisation, an NGO based out of Vienna, Austria. The conference was focused on immunity and traditional medical systems. There were 22 presentations by Siddha students/doctors. Experts from Central Council for Research in Siddha, National Institute of Siddha, all Siddha Medical Colleges of India and SriLanka and Siddha department of various Universities have participated. This the first time where more presentations were done in an International conference.