Rabies Vaccine Efficacy in India

Historical Context and Evolution

• The World Health Organization recommends that older nerve tissue vaccines like Semple vaccine be replaced with modern cell culture vaccines due to their higher efficacy, with a 1923 study in India showing 2.9% mortality with 1% Semple NTV compared to 6.2% in unvaccinated persons, and a 1946-1951 study showing 8.3% mortality with "completely treated" 5% Semple vaccine versus 43.2% in unvaccinated persons 1

Clinical Considerations

• The World Health Organization recommends that for post-exposure prophylaxis, the combination of rabies immunoglobulin and vaccine provides optimal protection, as stated in the MMWR Recommendations and Reports 1, 2