[1] World Health Organization. Influenza (seasonal). https://www.who.int/news-room/fact-sheets/detail/influenza-(seasonal). [2018-11-6].https://www.who.int/news-room/fact-sheets/detail/influenza-(seasonal)
[2] Blackburne BP, Hay AJ, Goldstein RA. Changing selective pressure during antigenic changes in human influenza H3. PLoS Pathog 2008;4(5):e1000058. http://dx.doi.org/10.1371/journal.ppat.1000058CrossRef
[3] Huang QS, Wood T, Jelley L, Jennings T, Jefferies S, Daniells K, et al. Impact of the COVID-19 nonpharmaceutical interventions on influenza and other respiratory viral infections in New Zealand. Nat Commun 2021;12(1):1001. http://dx.doi.org/10.1038/S41467-021-21157-9CrossRef
[4] Laurie KL, Rockman S. Which influenza viruses will emerge following the SARS-CoV-2 pandemic? Influenza Other Respir Viruses 2021;15(5):573-6. http://dx. doi.org/10.1111/irv.12866.
[5] Olsen SJ, Azziz-Baumgartner E, Budd AP, Brammer L, Sullivan S, Pineda RF, et al. Decreased influenza activity during the COVID-19 pandemic — united states, Australia, Chile, and south Africa, 2020. MMWR Morb Mortal Wkly Rep 2020;69(37):1305 − 9. http://dx.doi.org/10.15585/mmwr.mm6937a6externaliconCrossRef
[6] Zipfel CM, Colizza V, Bansal S. The missing season: the impacts of the COVID-19 pandemic on influenza. Vaccine 2021;39(28):3645 − 8. http://dx.doi.org/10.1016/j.vaccine.2021.05.049CrossRef
[7] World Health Organization. Recommended composition of influenza virus vaccines for use in the 2020–2021 northern hemisphere influenza season. https://www.who.int/publications/m/item/recommended-composition-of-influenza-virus-vaccines-for-use-in-the-2020-2021-northern-hemisphere-influenza-season. [2020-2-28].https://www.who.int/publications/m/item/recommended-composition-of-influenza-virus-vaccines-for-use-in-the-2020-2021-northern-hemisphere-influenza-season
[8] World Health Organization. Recommended composition of influenza virus vaccines for use in the 2021-2022 northern hemisphere influenza season. https://www.who.int/publications/m/item/recommended-composition-of-influenza-virus-vaccines-for-use-in-the-2021-2022-northern-hemisphere-influenza-season. [2021-2-26].https://www.who.int/publications/m/item/recommended-composition-of-influenza-virus-vaccines-for-use-in-the-2021-2022-northern-hemisphere-influenza-season
[9] Huang WJ, Cheng YH, Chen T, Li XY, Tan MJ, Wei HJ, et al. Characterization of influenza viruses — China, 2019−2020. China CDC Wkly 2020;2(44):856 − 61. http://dx.doi.org/10.46234/ccdcw2020.228CrossRef
[10] World Health Organization. Recommended composition of influenza virus vaccines for use in the 2022 southern hemisphere influenza season. https://www.who.int/publications/m/item/recommended-composition-of-influenza-virus-vaccines-for-use-in-the-2021-southern-hemisphere-influenza-season. [2021-9-24].https://www.who.int/publications/m/item/recommended-composition-of-influenza-virus-vaccines-for-use-in-the-2021-southern-hemisphere-influenza-season
[11] Chiu NC, Chi H, Tai YL, Peng CC, Tseng CY, Chen CC, et al. Impact of wearing masks, hand hygiene, and social distancing on influenza, enterovirus, and all-cause pneumonia during the coronavirus pandemic: retrospective national epidemiological surveillance study. J Med Internet Res 2020;22(8):e21257. http://dx.doi.org/10.2196/21257CrossRef
[12] Cowling BJ, Ali ST, Ng TWY, Tsang TK, Li JCM, Fong MW, et al. Impact assessment of non-pharmaceutical interventions against coronavirus disease 2019 and influenza in Hong Kong: an observational study. Lancet Public Health 2020;5(5):E279 − 88. http://dx.doi.org/10.1016/S2468-2667(20)30090-6CrossRef
[13] Soo RJJ, Chiew CJ, Ma S, Pung R, Lee V. Decreased influenza incidence under COVID-19 control measures, Singapore. Emerg Infect Dis 2020;26(8):1933 − 5. http://dx.doi.org/10.3201/eid2608.201229CrossRef
[14] Baker RE, Park SW, Yang WC, Vecchi GA, Metcalf CJE, Grenfell BT. The impact of COVID-19 nonpharmaceutical interventions on the future dynamics of endemic infections. Proc Natl Acad Sci USA 2020;117(48):30547 − 53. http://dx.doi.org/10.1073/pnas.2013182117CrossRef
[15] Olsen SJ, Winn AK, Budd AP, Prill MM, Steel J, Midgley CM, et al. Changes in influenza and other respiratory virus activity during the COVID-19 pandemic — United States, 2020–2021. MMWR Morb Mortal Wkly Rep 2021;70(29):1013 − 9. http://dx.doi.org/10.15585/mmwr.mm7029a1CrossRef