Frequency-dependent selection in vaccine-associated pneumococcal population dynamics. Author(s): Corander J, Fraser C, Gutmann MU, Arnold B, Hanage WP, Bentley SD, Lipsitch M, Croucher NJ|Journal: Nat Ecol Evol|PMID: 29038424| December 2017 Many bacterial species are composed of multiple lineages distinguished by extensive variation in gene content. These often cocirculate in the…