On January 24, 2022, Mahidol University Phra Nakhon (Mahidol Phra Nakhon) in collaboration with the Hot District Medical Center organized the administration of the third dose of COVID-19 vaccine, specifically the Pfizer vaccine, to personnel and students. A total of 1,088 individuals received the vaccine between January 24 and 25, 2022. Dr. Nattaworapol Ratchasirivanich, the President of Mahidol Phra Nakhon, received the vaccine and supervised the process, which took place at the Pramongklao Faculty of Business Administration, Mahidol Phra Nakhon (Phra Nakhon Business Center). This initiative was undertaken to control and prevent the spread of COVID-19, instill confidence in safety among students, personnel, and the general public, and facilitate the resumption of normal educational activities in a timely manner.