Negative frequency-dependent selection and asymmetrical transformation stabilise multi-strain bacterial population structures. Author(s): Harrow GL, Lees JA, Hanage WP, Lipsitch M, Corander J, Colijn C, Croucher NJ|Journal: ISME J|PMID: 33408365| January 2021 Streptococcus pneumoniae can be divided into many strains, each a distinct set of isolates sharing similar core and accessory genomes,…