Pneumococcal conjugate vaccine effectiveness against hypoxemia in children with suspected pneumonia in Kenya; analysis from a real-world sentinel surveillance platform - Fredrick Mutisya; George O. Agogo; Jared Opudo; Barbara Jepkorir; Athman Mwatondo; Daniel Langat; Peninah Munyua; Duncan Chege; Jonas Z. Hines (PLoS ONE, 2026)