Headline: Wearing masksPublication Date: Friday, December 17, 2021Primary Source: Greenfield Recorder (MA)Non-Cato Author: John R. HarringtonType: letterFormat: Newspaper (Print)Nature of Mention: citedScholar: CatoResearch Area: Health, Welfare & EntitlementsSubjects: the efficacy of masks against the spread of COVID-19Attached Files: cato_greenfieldrecorder_masks.pdf