Sia, Sonia B, Marietta L Lagrada, June M Gayeta, Melissa Ana L Masim, Jaywardeen P Abad, Mariane A Magbanua, and Ferissa Buensalida Ablola. “Serotype Distribution and Antimicrobial Resistance of Streptococcus Pneumoniae in the Philippines, 2012–2018”. Western Pacific Surveillance and Response 12, no. 4 (November 29, 2021): 8. Accessed April 16, 2024. https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/834.