The live attenuated subgroup B respiratory syncytial virus vaccine candidate RSV 2B33F is attenuated and immunogenic in chimpanzees, but exhibits partial loss of the ts phenotype following replication in vivo.

Abstract excerpt

The cold-adapted (ca), temperature-sensitive (ts) respiratory syncytial virus (RSV) subgroup B vaccine candidate, designated RSV 2B33F, was found previously to be restricted in replication, immunogenic, and protective against wild-type (wt) virus challenge in rodents and African green monkeys. We sought to investigate the level of attenuation, immunogenicity and genetic stability of this vaccine candidate in...

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