Context: In Europe, rates of tuberculosis began to rise in the early 1600s to a peak level in the 1800s, when it caused nearly 25% of all deaths. By the 1950s, mortality had decreased nearly 90%. Improvements in public health began significantly reducing rates of tuberculosis even before the arrival of streptomycin and other antibiotics, although the disease remained a significant threat to public health such that when the Medical Research Council was formed in Britain in 1913, its initial focus was tuberculosis research.

Question: When did the incidence of TB in Europe reach its highest point?
Answer: 1800s

Question: When tuberculosis was at its worst in Europe, what percentage of deaths was TB-related?
Answer: 25%

Question: What British health organization made tuberculosis its top priority at its start?
Answer: Medical Research Council

Question: What year was the Medical Research Council created?
Answer: 1913

Question: About how much had the death rate from TB been reduced in Europe by the midpoint of the 20th century?
Answer: 90%

Question: What percentage of deaths were caused by TB in the 1950s?
Answer: Unanswerable

Question: What reduced rates of mortality in the 1950s?
Answer: Unanswerable

Question: What organization brought antibiotics to Britain?
Answer: Unanswerable

Question: What year did streptomycin arrive?
Answer: Unanswerable