This is why we do population studies and don't rely on anecdotes because we cant be sure otherwise if the cause is due to a vaccine or randomness.

Random Flu Thoughts, including vaccination and base rates

by billswift 1 min read11th Nov 20119 comments

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I thought some of you might find this interesting, Random Flu Thoughts. The last part has a pretty good, if elementary, illustration of the importance of base rates.