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Vaccination and immunisation


The table below lists the medical details of 3 patients who were exposed to the tuberculosis bacterium.
Duration of symptoms4 months6 months1 week
Antibody productionSlowSlowRapid
Antibody levelsLowLowHigh
The doctor’s notes indicate that one of the patients had been vaccinated, and showed signs of immunological memory of the virus.
Which patient is most likely to have received the BCG vaccine against tuberculosis?
Choose 1 answer: