Click here for the original article. Educators should be wearing better masks, says Dr. Joseph G. Allen, director of the Healthy Buildings Program at Harvard University’s T.H. Chan School of Public Health. Not all masks are created equal. That may be obvious at this point in the pandemic, but choosing a mask that offers the most protection possible is once again important for educators who continue to teach in-person in the midst of the surging Omicron-fueled wave of COVID infections and the still significant tail end of the Delta wave. At many schools masking is optional, however, educators who choose to wear a mask can still afford themselves a good deal of protection. “One-way masking is fine,” said Dr. Joseph G. Allen, director of the Healthy Buildings Program at Harvard University’s T.H. Chan School of Public Health in a recent Tweet . “If you're vaccinated, and boosted, and wearing an N95, that's as low risk as anything in your...