4. “The University of Michigan-School of Public Health found hand washing reduced influenza-like illnesses; while mask wearing made no difference whatsoever.“
5. “A German randomized controlled trial found “there was no statistically significant effect” when it came to wearing masks “on secondary infections.”
6. “A 2010 randomized study in The Journal of Infectious Diseases found that neither “face mask use and hand hygiene nor face mask use alone was associated with a significant reduction in the rate of influenza-like illnesses cumulatively.”