felvizumab felvizumab felvizumab is a humanized monoclonal antibody against respiratory syncytial virus. felvizumabmonoclonal antibodytypewhole antibodysourcehumanized (from mouse)targetrsvclinical dataatc codenoneidentifierscas number167747-20-8 ychemspidernoneuniiw9za2k5q83keggd04136 y ny (what is this?) (verify)