_:n52efe6bf212445b386056613ba0b4492xb0
<http://schema.org/url>
<https://www.ansi.org/>
<https://www.ansi.org/news/standards-news/all-news/2021/02/2-22-21-weekly-covid-update-a-standard-for-face-coverings-a-white-paper-on-ppe-and-more>