Question: It is the most widely used vaccine worldwide, with more than 90% of all children being vaccinated. The immunity it induces decreases after about ten years. As tuberculosis is uncommon in most of Canada, the United Kingdom, and the United States, BCG is administered only to those people at high risk. Part of the reasoning against the use of the vaccine is that it makes the tuberculin skin test falsely positive, reducing the test's use in screening. A number of new vaccines are currently in development.
Is there an answer to this question: What percentage of children have TB?

Answer: unanswerable

Question: Contrary to the diffusionist theory, it appears that there was simultaneously a structural evolution towards the pointed arch, for the purpose of vaulting spaces of irregular plan, or to bring transverse vaults to the same height as diagonal vaults. This latter occurs at Durham Cathedral in the nave aisles in 1093. Pointed arches also occur extensively in Romanesque decorative blind arcading, where semi-circular arches overlap each other in a simple decorative pattern, and the points are accidental to the design.
Is there an answer to this question: Which cathedral is the twisted arch used to match the heights of transverse and diagonal vaults?

Answer: unanswerable

Question: The required beliefs of these clauses include belief in a Supreme Being and belief in a future state of rewards and punishments. (Tennessee Constitution Article IX, Section 2 is one such example.) Some of these same states specify that the oath of office include the words "so help me God." In some cases these beliefs (or oaths) were historically required of jurors and witnesses in court. At one time, such restrictions were allowed under the doctrine of states' rights; today they are deemed to be in violation of the federal First Amendment, as applied to the states via the 14th amendment, and hence unconstitutional and unenforceable.
Is there an answer to this question: What language do some of the same states specify the oath of office include?

Answer: so help me God

Question: A Federal Trade Commission report issued in 1958 attempted to quantify the effect of antibiotic development on American public health. The report found that over the period 1946-1955, there was a 42% drop in the incidence of diseases for which antibiotics were effective and only a 20% drop in those for which antibiotics were not effective. The report concluded that "it appears that the use of antibiotics, early diagnosis, and other factors have limited the epidemic spread and thus the number of these diseases which have occurred". The study further examined mortality rates for eight common diseases for which antibiotics offered effective therapy (syphilis, tuberculosis, dysentery, scarlet fever, whooping cough, meningococcal infections, and pneumonia), and found a 56% decline over the same period. Notable among these was a 75% decline in deaths due to tuberculosis.
Is there an answer to this question: What were eight diseases examined for?

Answer:
mortality rates