RSV genotype displacement
Genotype displacement among the circulating RSV-A and RSV-B genotypes was observed within the 10-year study period. NA1 genotype was detected as early as February 2007 in the Metro Manila, Philippines and continued to circulate until 2015. BA9 genotype was detected in the in the province of Capiz located in the western region of the Visayas islands in the Philippines in 2009 until 2013. This study was able to detect ON1 genotype in the province of Pangasinan, which is in the western area of Luzon as early as June 2010. Simultaneous detection of genotypes BA2 in the province of Zamboanga del Sur in Mindanao and BA9 (Cagayan, Philippines) were reported within the same year.