Another determined to ignore the observations of others. Wonder how he thinks Jenner came up with cowpox idea...?https://twitter.com/execcanuck/status/740657903468740610 …
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But uncontrolled personal observation has been proven unreliable as a source of evidence. The control is key. @ExecCanuck
Controls r wonderful & controlled experiments based on observations should be done. Too bad no one's doing that w/vaxes.
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