The analysis evaluated 95 confirmed Covid-19 infections among the trial’s 30,000 participants. Moderna, which developed its vaccine in collaboration with the National Institute of Allergy and Infectious Diseases, said 90 cases of Covid-19 were observed in the placebo group versus 5 cases observed in the group that received its two-dose vaccine. That resulted in an estimated vaccine efficacy of 94.5%, it said.
听着就不太靠谱。用绝对病例数字来比较，说明实验组和对照组的参加人数是相同的，也就是说15000人给的是安慰剂，这些人中竟然只有90人感染，0.6%？
要知道全美国3亿3千万人的感染数字是1100万，3.3%，也就是说光是他们安慰剂就有82%有效率。
