Those who cannot remember the past are condemned to repeat it.
George Santayana
This can also be rephrased as "history is cyclical," in the sense that as a society forgets a piece of wisdom, it will recreate the same problematic conditions that lead to rediscovering that wisdom
"Western" medicine has a strongly progressive historical self-history, often derisive or insulting to the work of past physicians. And so we see portrayals of medieval medicine as leeching, battlefield amputation without anesthetic, bird-like plague masks
In this process of medicine's scorched-earth self-retellings, an unknown quantum of wisdom is lost. Those writings which are retained (Osler, Harvey, Avicenna, Galen, Hippocrates) are seldom studied, and even more rarely sought for useful information
Currently, for example, global society is entranced and embroiled in the problem of covid. Slowly, the focus of the world's population turns to the specific problem of how covid is transmitted. Masks proliferate - problem solved? Seemingly not. Something doesn't satisfy the mind
In the background, some reject masks as outright useless, while others wear double-masks, or sealed N95 masks. The concept of "aerosol" begins to percolate. This is problematic to an absurd degree to epidemic control, as social distancing and masks don't make sense for aerosol
And so aerosolization of virus is (desperately?) ignored, as much by those who favour masks as by those who deride them. Because it breaks the current narratives on both sides of the public health aisle
Now it is time to return to the start of this thread, namely, the lessons of history. And even more, to the plague mask with its odd bird shape.…

Within descriptions of plague masks are references to "miasma theory" - the notion that the air itself can become contaminated, and must be cleansed. A theory which modern med derides as ridiculous. And so we return to aerosols.
I am far from the first to think of the link between aerosol spread and miasma theory, although this may be its first appearance on twitter.…
An abortive discussion on the issue from October
A search for "aerosol" and "miasma" in twitter yields parallel discussion

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More from @JeanmarcBenoit

27 Nov
CIHI lockdown report:"What we didn’t expect to see during Wave 1 was a 17% to 21% decline in life-saving and urgent surgeries (procedures in this category include things like pacemaker insertions, bypass surgeries and cancer surgeries)."
"We don’t know exactly what led to this decline or its impact on the patients who didn’t receive those procedures."

This is the premiere health data analysis organization in Canada...
It would be helpful to include coroner data for deaths out of hospital during these periods
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