It was my pleasure to join the interesting course titled ‘Vaccinology: Science and Public Health‘ held in Nagasaki University between 24 and 28 August 2026. Although I studied immunology before, I explored a lot related to the industrial aspects regarding vaccine development and production. Meanwhile, I also met a lot of sophisticated collagues from around the world. Nagasaki was a lovely quite place; I had some refreshing time staying there.