Iamsirithaworn, S., Akarasewi, P., Yingyong, T., Suthachana, S., Pittayawonganon, C. and Ungchusak, K. 2020. Three Waves of the 2009 H1N1 Infl uenza Pandemic in Thailand. Siriraj Medical Journal. 63, 2 (Apr. 2020), 64–67.