To the Editor.—
My 12-year-old son was recently diagnosed as having measles. His medical records indicate that he received "measles vaccine" in 1963. His current pediatrician mentioned that he and his colleagues have seen several cases of measles in persons who supposedly were vaccinated. Some of these patients had even had booster immunizations.
This raises some very interesting epidemiological questions. (1) Is the current form of measles caused by a single newly mutated viral strain, or (2) Do the current measles cases indicate that the patients received an ineffective vaccine? If this is the situation, how widely distributed was the ineffective batch(es)?
To facilitate future epidemiological studies, it would be extremely helpful if physicians would record the following information on the patient's medical record: (1) name of vaccine, (2) company producing the vaccine, (3) date of production, and (4) lot or batch number used. Similar information might also be recorded
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