https://www.thegatewaypundit.com/2021/04/stanford-study-results-facemasks-ineffective-block-transmission-covid-19-actually-can-cause-health-deterioration-premature-death/

Full study available here: https://www.scribd.com/document/503573509/Facemasks-in-the-COVID-19-era-A-health-hypothesis-by-Baruch-Vainshelboim