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Immunization Related Terms

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  • Temporal Association

  • Two or more events that occur around the same time but are unrelated, chance occurrences.

  • Tetanus

  • Toxin-producing bacterial disease marked by painful muscle spasms.

  • Thimerosal

  • Thimerosal is a mercury-containing preservative that has been used in some vaccines and other products since the 1930's. There is no evidence that the low concentrations of thimerosal in vaccines have caused any harm other than minor reactions like redness or swelling at the injection site. However, in July 1999 the U.S. Public Health Service, the American Academy of Pediatrics, and vaccine manufacturers agreed that thimerosal should be reduced or eliminated from vaccines as a precautionary measure. Today, all routinely recommended childhood vaccines manufactured for the U.S. market contain either no thimerosal or only trace amounts.

  • Titer

  • The detection of antibodies in blood through a laboratory test.

  • Transverse Myelitis

  • The sudden onset of spinal cord disease. Symptoms include general back pain followed by weakness in the feet and legs that moves upward. There is no cure and many patients are left with permanent disabilities or paralysis. Transverse Myelitis is a demyelinating disorder that may be associated with Multiple Sclerosis (MS). Also see demyelinating disorders.

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Immunization Terms

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