Substitutions near the receptor binding site determine major antigenic change during influenza virus evolution. - Koel BF; Burke DF; Bestebroer TM; van der Vliet S; Zondag GC; Vervaet G; Skepner E; Lewis NS; Spronken MI; Russell CA; Eropkin MY; Hurt AC; et al. (Science (New York, N.Y.), 2013)