Thread: Mass. School Openings Requires Masks
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Old 06-29-2020, 03:46 AM  
mopek1
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Quote:
Originally Posted by OneHungLo View Post
Has that been proven? I've never heard that.
https://www.nejm.org/doi/full/10.1056/NEJMoa2006100

http://www.sickkids.ca/PDFs/About-Si...g-SickKids.pdf
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