Study shows multi-layer face masks work better to stop coronavirus 0 10.08.2020 03:24 CBSNews.com Experts say cloth face coverings can help stop the spread of COVID-19, and new research suggests masks with two layers of fabric are more effective than those with a single layer. CBS News' Naomi Ruchim has details. Партнёры Smi24.net Все новости за 24 часа Музыкальные новости Агрегатор новостей 24СМИ
