Distance to health services affects local-level vaccine efficacy for pneumococcal conjugate vaccine (PCV) among rural Filipino children

Elisabeth Dowling Root, Marilla Lucero, Hanna Nohynek, Peter Anthamatten, Deborah SK Thomas, Veronica Tallo, Antti Tanskanen, Beatriz P Quiambao, Taneli Puumalainen, Socorro P Lupisan, Petri Ruutu, Erma Ladesma, Gail M Williams, Ian Riley, Eric AF Simoes