PMC5528908_01
Phylogenetic analysis of HA amino acid sequences derived from 2009 pandemic influenza viruses by maximum likelihood technique using MEGA 5 software (PFuVac = patient).
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PMC5528908_01_10.1177_2333794X17719203-fig1.jpg
fig1-2333794X17719203
Thai virus isolates obtained from the first epidemic wave (A/Nonthaburi/102/2009 and A/Thailand/104/2009), and 2 more virus isolates from 2014 (A/Thailand/NMA_1/2014 and A/Thailand/BKK_1/2014) See Figure 1. The results demonstrate a closer relationship between the causative virus and the circulating strains rather than the vaccine strain closely related to the Thai viruses from the first epidemic wave.