L. Simonsen, M. Clarke, G. Williamson, D. Stroup, and H. Arden, The impact of influenza epidemics on mortality: introducing a severity index., American Journal of Public Health, vol.87, issue.12, pp.1944-1950, 1997.
DOI : 10.2105/AJPH.87.12.1944

W. Thompson, D. Shay, E. Weintraub, L. Brammer, and N. Cox, Mortality Associated With Influenza and Respiratory Syncytial Virus in the United States, JAMA, vol.289, issue.2, pp.179-186, 2003.
DOI : 10.1001/jama.289.2.179

F. Dawood, A. Luliano, C. Reed, M. Meltzer, and D. Shay, Estimated global mortality associated with the first 12 months of 2009 pandemic influenza A H1N1 virus circulation: a modelling study, The Lancet Infectious Diseases, vol.12, issue.9, pp.687-695, 2012.
DOI : 10.1016/S1473-3099(12)70121-4

B. Finkelman, C. Viboud, K. Koelle, M. Ferrari, and N. Bharti, Global Patterns in Seasonal Activity of Influenza A/H3N2 Viral Coexistence and Latitudinal Gradients, PLos One, vol.12, p.1296, 1997.

L. Shek and B. Lee, Epidemiology and seasonality of respiratory tract virus infections in the tropics, Paediatric Respiratory Reviews, vol.4, issue.2, pp.104-111, 2003.
DOI : 10.1016/S1526-0542(03)00024-1

C. Beckett, H. Hosasih, C. Ma-'roef, E. Listiyonengsih, and I. Elyazar, Influenza Surveillance in Indonesia: 1999-2003, Clinical Infectious Diseases, vol.17, issue.2, pp.443-449, 1999.
DOI : 10.1016/S1386-6532(02)00172-5
URL : https://academic.oup.com/cid/article-pdf/39/4/443/1044478/39-4-443.pdf

S. Doraisingham, K. Goh, A. Ling, and M. Yu, Influenza surveillance in Singapore, Bull World Health Organ, vol.66, pp.1972-86, 1988.

H. Nguyen, R. Saito, H. Ngiem, M. Nishikawa, and Y. Shobugawa, Epidemiology of influenza in Hanoi, Vietnam, from 2001 to 2003, Journal of Infection, vol.55, issue.1, pp.58-63, 2001.
DOI : 10.1016/j.jinf.2006.12.001

B. Rao and K. Banerjee, Influenza surveillance in Pune, India. Bull World Health Organ, vol.71, pp.177-181, 1993.

H. Tsai, P. Kuo, C. Liu, and J. Wang, Respiratory Viral Infections among Pediatric Inpatients and Outpatients in Taiwan from 1997 to 1999, Journal of Clinical Microbiology, vol.39, issue.1, pp.111-118, 2001.
DOI : 10.1128/JCM.39.1.111-118.2001

S. Mardy, S. Ly, S. Heng, S. Vong, and C. Huch, Influenza activity in Cambodia during 2006-2008, BMC Infectious Diseases, vol.358, issue.3, p.168, 2006.
DOI : 10.1056/NEJMra0707279
URL : https://bmcinfectdis.biomedcentral.com/track/pdf/10.1186/1471-2334-9-168?site=bmcinfectdis.biomedcentral.com

C. Viboud, W. Alonso, and L. Simonsen, Influenza in Tropical Regions, PLoS Medicine, vol.342, issue.4, pp.468-0471, 2006.
DOI : 10.1371/journal.pmed.0030089.t001

R. Webster, W. Bean, O. Gorman, T. Chambers, and Y. Kawaoka, Evolution and ecology of influenza A viruses, Microbiol Rev, vol.56, pp.152-179, 1992.

M. Larkin, G. Blackshields, N. Brown, R. Chenna, and P. Mcgettigan, Clustal W and Clustal X version 2.0, Bioinformatics, vol.15, issue.1, pp.2947-2948, 2007.
DOI : 10.1093/bioinformatics/15.1.87
URL : https://hal.archives-ouvertes.fr/hal-00206210

D. Swofford, PAUP*: Phylogenetic Analysis Using Parsimony (and other methods) 4.0 Beta, 2002.

M. Naughtin, J. Dyason, S. Mardy, S. Sorn, and M. Von-itzstein, ABSTRACT, Antimicrobial Agents and Chemotherapy, vol.55, issue.5, pp.2004-2010, 2011.
DOI : 10.1128/AAC.01773-10

P. Blair, T. Wierzba, S. Touch, S. Vonthanak, and X. Xu, Influenza epidemiology and characterization of influenza viruses in patients seeking treatment for acute fever in Cambodia, Epidemiology and Infection, vol.18, issue.02, pp.199-209, 2010.
DOI : 10.1016/S0140-6736(04)15595-5

H. Nair, W. Brooks, M. Katz, A. Roca, and J. Berkley, Global burden of respiratory infections due to seasonal influenza in young children: a systematic review and meta-analysis, The Lancet, vol.378, issue.9807, pp.1917-1930, 2011.
DOI : 10.1016/S0140-6736(11)61051-9

O. Brien, K. Walters, M. Sellman, and J. , Severe Pneumococcal Pneumonia in Previously Healthy Children: The Role of Preceding Influenza Infection, Clinical Infectious Diseases, vol.146, issue.5, pp.784-789, 2000.
DOI : 10.1001/archpedi.1995.02170230067009

J. Mccullers, J. Mcauley, S. Browall, A. Iverson, and K. Boyd, in Ferrets, The Journal of Infectious Diseases, vol.202, issue.8, pp.1287-1295, 2010.
DOI : 10.1086/656333

R. Hope-simpson, SUMMARY, Journal of Hygiene, vol.54, issue.01, pp.35-47, 1981.
DOI : 10.1017/S002217240002578X

M. Chittaganpitch, K. Supawat, S. Olsen, S. Waicharoen, and S. Patthamadilok, Influenza viruses in Thailand: 7???years of sentinel surveillance data, 2004-2010, Influenza and Other Respiratory Viruses, vol.55, issue.Suppl 1, pp.276-283, 2004.
DOI : 10.1016/j.jinf.2006.12.001

J. Jian, J. Chen, C. Lai, L. Hsu, and P. Chen, Genetic and Epidemiological Analysis of Influenza Virus Epidemics in Taiwan during 2003 to 2006, Journal of Clinical Microbiology, vol.46, issue.4, pp.1426-1434, 2003.
DOI : 10.1128/JCM.01560-07

M. Medina, X. Xu, G. Perez-oronoz, and T. Wallis, Seasonal influenza vaccine policies, recommendations and use in the World Health Organization's Western Pacific Region Incidence of amantadine resistance among influenza A(H3N2) viruses isolated worldwide from, Members of the Western Pacific Region Global Influenza Surveillance and Response System, pp.1175-1181, 1994.

R. Bright, D. Shay, B. Shu, N. Cox, and A. Klimov, Adamantane Resistance Among Influenza A Viruses Isolated Early During the 2005-2006 Influenza Season in the United States, JAMA, vol.295, issue.8, pp.891-894, 2006.
DOI : 10.1001/jama.295.8.joc60020

I. Barr, Y. Deng, P. Iannello, A. Hurt, and N. Komadina, Adamantane resistance in influenza A(H1) viruses increased in 2007 in South East Asia but decreased in Australia and some other countries, Antiviral Research, vol.80, issue.2, pp.200-205, 2008.
DOI : 10.1016/j.antiviral.2008.06.008

S. Leang, Y. Deng, R. Shaw, N. Caldwell, and P. Iannello, Influenza antiviral resistance in the Asia-Pacific region during 2011, Antiviral Research, vol.97, issue.2, pp.206-210, 2013.
DOI : 10.1016/j.antiviral.2012.12.016

G. He, J. Qiao, C. Dong, C. He, and L. Zhao, Amantadine-resistance among H5N1 avian influenza viruses isolated in Northern China, Antiviral Research, vol.77, issue.1, pp.72-76, 2008.
DOI : 10.1016/j.antiviral.2007.08.007

L. Simonsen, C. Viboud, B. Grenfell, J. Dushoff, and L. Jennings, The Genesis and Spread of Reassortment Human Influenza A/H3N2 Viruses Conferring Adamantane Resistance, Molecular Biology and Evolution, vol.24, issue.8, pp.1811-1820, 2007.
DOI : 10.1093/molbev/msm103

N. Ilyushina, E. Govorkova, and R. Webster, Detection of amantadine-resistant variants among avian influenza viruses isolated in North America and Asia, Virology, vol.341, issue.1, pp.102-106, 2005.
DOI : 10.1016/j.virol.2005.07.003

J. Mckimm-breschkin, T. Trivedi, A. Hampson, A. Hay, and A. Klimov, Neuraminidase Sequence Analysis and Susceptibilities of Influenza Virus Clinical Isolates to Zanamivir and Oseltamivir, Antimicrobial Agents and Chemotherapy, vol.47, issue.7, pp.2264-2272, 2003.
DOI : 10.1128/AAC.47.7.2264-2272.2003

A. Hurt and I. Barr, Influenza viruses with reduced sensitivity to the NA inhibitor drugs in untreated young children, Commun Dis Intell, vol.32, pp.57-62, 2008.

M. Fourment, S. Mardy, M. Channa, and P. Buchy, Evidence for Persistence of and Antiviral Resistance and Reassortment Events in Seasonal Influenza Virus Strains Circulating in Cambodia: FIG. 1., Journal of Clinical Microbiology, vol.48, issue.1, pp.295-297, 2010.
DOI : 10.1128/JCM.01687-09

A. Hurt, E. J. Deng, Y. Iannello, P. Besselaar, and T. , Emergence and spread of oseltamivir-resistant A(H1N1) influenza viruses in Oceania, South East Asia and South Africa, Antiviral Research, vol.83, issue.1, pp.90-93, 2009.
DOI : 10.1016/j.antiviral.2009.03.003

A. Monto, J. Mckimm-breschkin, C. Macken, A. Hampson, and A. Hay, Detection of Influenza Viruses Resistant to Neuraminidase Inhibitors in Global Surveillance during the First 3 Years of Their Use, Antimicrobial Agents and Chemotherapy, vol.50, issue.7, pp.2395-2402, 2006.
DOI : 10.1128/AAC.01339-05

E. Holmes, E. Ghedin, N. Miller, J. Taylor, and Y. Bao, Whole-Genome Analysis of Human Influenza A Virus Reveals Multiple Persistent Lineages and Reassortment among Recent H3N2 Viruses, PLoS Biology, vol.100, issue.9, pp.1579-1588, 2005.
DOI : 10.1371/journal.pbio.0030300.st002

E. Pariani, E. Fratt, A. Amendola, A. Zappa, and S. Bianchi, Molecular characterization and phlylogenetic analysis of human influenza A viruses in three consecutive seasons with different epidemiological profiles, J Prev Med Hyg, vol.50, pp.113-116, 2009.

M. Nelson, L. Simonsen, C. Viboud, M. Miller, and E. Holmes, Phylogenetic Analysis Reveals the Global Migration of Seasonal Influenza A Viruses, PLoS Pathogens, vol.79, issue.9, pp.1220-1228, 2007.
DOI : 10.1371/journal.ppat.0030131.st001

M. Nelson, D. Spiro, D. Wentworth, J. Fan, and E. Beck, The early diversification of influenza A/H1N1pdm, PLoS Currents, vol.1, p.1126, 2009.
DOI : 10.1371/currents.RRN1126

V. Potdar, M. Chadha, S. Jadhav, J. Mullick, and S. Cherian, Genetic Characterization of the Influenza A Pandemic (H1N1) 2009 Virus Isolates from India, PLoS ONE, vol.5, issue.3, p.9693, 2010.
DOI : 10.1371/journal.pone.0009693.t003

J. Stevens, A. Corper, C. Basler, J. Taubenberger, and P. Palese, Structure of the Uncleaved Human H1 Hemagglutinin from the Extinct 1918 Influenza Virus, Science, vol.303, issue.5665, pp.1866-1870, 2004.
DOI : 10.1126/science.1093373

G. Glinsky, Genomic analysis of pandemic (H1N1) 2009 reveals association of increasing disease severity with emergence of novel hemagglutinin mutations, Cell Cycle, vol.9, issue.5, pp.958-970, 2010.
DOI : 10.4161/cc.9.5.10913

M. Igarashi, K. Ito, R. Yoshida, D. Tomabechi, and H. Kida, Predicting the Antigenic Structure of the Pandemic (H1N1) 2009 Influenza Virus Hemagglutinin, PLoS ONE, vol.25, issue.12, p.8553, 2010.
DOI : 10.1371/journal.pone.0008553.s010

S. Maurer-stroh, R. Lee, F. Eisenhaber, L. Cui, and S. Phuah, A new common mutation in the hemagglutinin of the 2009 (H1N1) influenza A virus, PLoS Currents, vol.2, p.1162, 2010.
DOI : 10.1371/currents.RRN1162

N. Ferguson, A. Galvani, and R. Bush, Ecological and immunological determinants of influenza evolution, Nature, vol.1, issue.6930, pp.428-433, 2003.
DOI : 10.1016/S0140-6736(79)90468-9

J. Mccullers, G. Wang, S. He, and R. Webster, Reassortment and insertion-deletion are strategies for the evolution of influenza B viruses in nature, 1999.

H. Tsai, H. Wang, D. Kiang, S. Huang, and P. Kuo, Increasing Appearance of Reassortant Influenza B Virus in Taiwan from 2002 to 2005, Journal of Clinical Microbiology, vol.44, issue.8, pp.2705-2713, 2002.
DOI : 10.1128/JCM.02694-05