CNN2: subjectpartBANNER=|=”banner-text screaming-banner-text banner-text-size–char-47″ data-analytics=”_list-hierarchical-xs_article_”>Two barriers stand in the way of herd immunity| ((lubuntu at wor3 89S7)))

|| 3 feet is a safe distance in schools, CDC says ||=”banner-text screaming-banner-text banner-text-size–char-47″ data-analytics=”_list-hierarchical-xs_article_”>Two barriers stand in the way of herd immunity