[tlogan]

Can you please share an US based study which shows that mask mandates are effective? I’m really puzzled but that part.

[ChefboyOG]

I can understand why you're puzzled, as my comment was not about mask mandates.

But in the spirit of helping, roughly 6 seconds of Googling in regards to your question turned up this https://www.healthaffairs.org/doi/10.1377/hlthaff.2021.01072