A live‐attenuated pneumococcal vaccine elicits CD4+ T‐cell dependent class switching and provides serotype independent protection against acute otitis media oleh Jason W Rosch, Amy R Iverson, Jessica Humann, Beth Mann, Geli Gao, Peter Vogel, Michael Mina, Kyle A Murrah, Antonia C Perez, W Edward Swords, Elaine I Tuomanen, Jonathan A McCullers