I wear a mask at work (infectious patients) & in crowded settings (eg supermarkets) & they are easy to wear so it’s no problem.

I can also admit that masks have uncertain observational evidence.

Now there is a randomised trial:

https://www.acpjournals.org/doi/10.7326/M20-6817

(1/5)
It’s not the end. There are still + uncertainties & I will continue to wear a mask in these settings to protect others from a theoretical risk (& it’s easy to wear them!).

But please remember those still-prominent media-scientists conclusively stating a randomised trial of (2/5)
mask-wearing a) couldn’t happen & b) also that masks are incredibly beneficial (absolute risks rarely given) judged by a droplet study from a lab or from observational data.

Bogus scientific claims & misplaced certainty are equally as bad as the conspiracy theories that (3/5)
.. threaten our public health response. They ultimately will harm our vaccine rollout & the credibility of science.

We need to have a lot more humility from (& scepticism listening to) certain media-scientists, who sometimes do not seem to understand real-world clinical (4/5)
evidence Vs evidence from a lab, and who persistently platform definitive-claims without reference to absolute-risk or the hierarchy of evidence (5/5)
You can follow @DrMarkMurphy.
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