OR, 0.57; 95% CI: 0.32-1.04 🥲

I’m so surprised that there aren’t more and bigger studies on this. I understand that collecting data is expensive etc etc. BUT I think the public health implications would be huge. If their effects are even just close to an OR = 0.5, just put them everywhere pls 🙏
Reposted from Saloni
New RCT detects no impact of HEPA filters on respiratory infections in people in residential care homes.

But unfortunately, the design isn't very informative overall.
jamanetwork.com/journals/jam...

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