Infiltrate the entire calculated dose directly into and around all wound margins. Administer any remaining volume IM at a site distant from the vaccine injection.
Timing
RIG/RMAb must not be administered beyond Day 7 after the first vaccine dose, as it may blunt the developing active immune response.
Rabies Monoclonal Antibodies (RMAb): The Paradigm Shift
WHO 2018 Position Paper: If available, the use of monoclonal antibody products instead of RIG is encouraged for passive immunization during PEP.
Two RMAb products are licensed in India and serve as alternatives to conventional RIG. Unlike polyclonal RIG (derived from human or equine plasma), monoclonal antibodies are produced in vitro, offering consistent batch-to-batch potency, no risk of blood-borne pathogens, and potentially superior supply at lower cost. The infiltration principle is identical to RIG: instill the full dose into and around wound margins on Day 0.
Product
Type
Dose
Key Evidence
Rabishield(SII, India)
Single human IgG1 MAb (17C7)
3.33 IU/kg
Phase 2/3 non-inferiority to HRIG; Day 14 GMC ratio 4.23 (Gogtay et al. 2018). Licensed India 2016.
Twinrab(Zydus, India)
Cocktail of 2 murine MAbs (Docaravimab + Miromavimab)
40 IU/kg
Phase 3 non-inferiority to HRIG (Kansagra et al. 2021). WHO EML inclusion 2021. Licensed India 2019.
⚠ Dosing Alert: Rabishield (3.33 IU/kg) and Twinrab (40 IU/kg) have vastly different dose calculations. Always verify the specific product before calculating the dose. These are NOT interchangeable on a per-IU basis.
Abbreviations: PEP (Post-Exposure Prophylaxis) · PrEP (Pre-Exposure Prophylaxis) · RIG (Rabies Immunoglobulin) · ERIG (Equine RIG) · HRIG (Human RIG) · RMAb (Rabies Monoclonal Antibody) · MAb (Monoclonal Antibody) · ARV (Anti-Rabies Vaccine) · ID (Intradermal) · IM (Intramuscular) · IU (International Units) · RVNA (Rabies Virus Neutralising Antibody) · GMC (Geometric Mean Concentration) · WHO (World Health Organization) · NCDC (National Centre for Disease Control) · SII (Serum Institute of India)
Algorithm References & Evidence Base
Ministry of Health and Family Welfare, Government of India. National Guidelines for Rabies Prophylaxis, 2019. National Rabies Control Programme, NCDC; 2020.
World Health Organization. Rabies vaccines: WHO position paper, April 2018. Vaccine. 2018;36(37):5500-3.
World Health Organization. Expert Consultation on Rabies, Third report. WHO Technical Report Series, No. 1012; 2018.
Gogtay NJ, Munshi R, Ashwath Narayana DH, et al. Comparison of a Novel Human Rabies Monoclonal Antibody to Human Rabies Immunoglobulin for Postexposure Prophylaxis: A Phase 2/3, Randomized, Single-Blind, Noninferiority, Controlled Study. Clin Infect Dis. 2018;66(3):387-395.
Kansagra K, Parmar D, Mendiratta SK, et al. A Phase 3, Randomised, Open-Label, Non-inferiority Trial Evaluating Anti-Rabies Monoclonal Antibody Cocktail (TwinRab) Against Human Rabies Immunoglobulin. Clin Infect Dis. 2021;72(12):e667-e675.
Gongal G, Sampath G. Monoclonal antibodies for rabies post-exposure prophylaxis: A paradigm shift in passive immunization. Arch Prev Med. 2020;5(1):035-038.
How to Cite This Tool
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