Herd Immunity Threshold Calculator
HIT from basic reproduction number (R0).
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
%
Results
Herd immunity threshold (%)
66.7%
Required vaccination coverage (%)74.1%
People to vaccinate244,530,000
Effective R at target coverage1
Susceptible remaining110,000,000
Critical Threshold66.7
How to Use This Calculator
- Enter Basic reproduction number (R0), Vaccine efficacy (%), and Population size.
- Review the Herd immunity threshold (%) (%) result.
- Use Required vaccination coverage (%) (%) and People to vaccinate to inform your decision.
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