I told you time and time again that you cannot only use 2 schools systems to justify using masks. Under your own reasoning, you would have to accept the data (printed in our Savannah Morning News and posted online) that Chatham County schools, which required masks, had more per-capita Covid cases than neighboring Effingham County schools, where no one masked. You would also have to accept the data from South Carolina where statewide, schools that required masks had no fewer per-capita cases of Covid than schools that did not require them.
Yet, you keep hanging your hat on one tiny, statistically flawed and insignificant "study" done in Massachusetts while ignoring other and MORE COMPLETE data that completely contradict this.