https://ift.tt/2wwdHAe How Long Do I Retain Immunity? Mumps, Measles, Tetanus, Smallpox Antibody half-life varies tremendously, from about 11 years for tetanus to over 200 years for measles and mumps. RICHARD KLASCO, M.D. https://ift.tt/2O1LOYu September 21, 2018 at 05:30AM
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