a comparative study on the immunogenicity, safety and tolerance of purified duck embryo vaccine (pdev) manufactured in india (vaxirab) and switzerland (lyssavac-n): a randomized simulated post-exposure study in healthy volunteers.purified duck embryo vaccine (pdev, vaxirab) for rabies prophylaxis is now indigenously manufactured in india under technology transfer from berna biotech who made the original pdev (lyssavac). in the present study we have compared the two vaccines in terms of safety, immunogenicity and tolerance. the study was conducted in 220 adult healthy volunteers. it was observed that both vaccines produced neutralizing antibody titers (as determined by rapid fluorescent focus inhibition test, rffit) more ...200717981377
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