To think so requires a fundamental misunderstanding of science & public health policy.
Scientific knowledge changes. Public health policy changes with it.
Mask policy is an example.
A thread:
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Science is a process.
We propose hypotheses about how something works in the world, then use experiments that try to disprove those hypotheses. If we can't disprove them, we assume them to be true--for now.
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When it first emerged, the science community reasonably inferred it would behave like other coronaviruses...
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But scientists began testing that hypothesis.
Meanwhile, the virus was spreading quickly & ppl were getting extremely sick.
This put a strain on hospitals' PPE.
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This threatened to choke off #PPE & masks from people who needed it most: healthcare workers on the frontlines working with SYMPTOMATIC ppl.
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wired.com/story/amazon-s…
1) because we didn't think masks could protect them (e.g. symptomatic vs. asymptomatic spread)
2) to reduce demand & save masks for ppl we thought needed them.
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We learned:
1) #COVID19 spread *without* symptoms
2) cloth masks were effective at stopping it
Policymakers reversed course: EVERYONE should wear masks to protect against asymptomatic spread.
We learned something new & adjusted policy accordingly.
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Scientific knowledge changes. Policy changes with it.
This is how the process is supposed to work. Lack of knowledge is not "lying," it's just lack of knowledge.
But...
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Blame the politicians & pundits who've tried to twist their words for their ends, or silence them.
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