While the focus on pollution is bizarre to me, and the papers problematic, I think that your criticism is conflating severity of infection with probability of infection.
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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Same for Bangkok. Multiple times a year we have warnings to not go outside due to the pollution. And Chiang Mai has “haze” from when fields get razed and the smoke lingers for weeks/months
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wrong kind of 'haze' smoke

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Sounds like you've got it solved! Nice work.
End of conversation
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