Which is strong evidence that the danger is very small, very rare, or takes a very long time to develop.
You don't need a large clinical trial to prove that being shot in the head is harmful; you do need a very large trial to detect that, say, a drug increases the risk of cardiovascular disease by 4% in a specific sub-population.
Which is strong evidence that the danger is very small, very rare, or takes a very long time to develop.
You don't need a large clinical trial to prove that being shot in the head is harmful; you do need a very large trial to detect that, say, a drug increases the risk of cardiovascular disease by 4% in a specific sub-population.