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dbr
Sure, she’s only an Oxford professor of primary care, famous for teaching how to critically approach scientific literature. No reason to read her thoughts whatsoever.
Had you read the article, or even the WHO's justification of that statement
(namely (a) wetness decreases efficacy, and (b) it MAY increase respiratory effort)
[both of which we have previously discussed on this forum at various points in the mask threads- with me and several others suggesting the inefficacy in the early days- to my chagrin]
you might reconsider your position.
Personally- as the Prof Greenhalgh says- its a location based assessment-
Road/off road riding- on your own out of town- no need- minimal interaction time/ none.
Towpath riding/ park riding/ running on a busy stretch- probably wear one, yeah.