In lubeck, germany, in 1930, a group of 251 infants was accidentally administered a tainted vaccine for tuberculosis that contained live mycobacterium tuberculosis. this vaccine was administered orally, directly exposing the infants to the deadly bacterium. many of these infants contracted tuberculosis, and some died. however, 44 of the infants never contracted tuberculosis. based on your knowledge of the innate immune system, what innate defenses might have inhibited m. tuberculosis enough to prevent these infants from contracting the disease?
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