Democrat & ChroniclePatient at New York hospital tests positive for South African coronavirus variantFeb 15, 2021bookmark_bordersharemore_vert
NBC NewsPfizer says South African variant could significantly reduce vaccine protectionFeb 17, 2021bookmark_bordersharemore_vert
STATIn lab experiment, Pfizer-BioNTech vaccine less potent against coronavirus variantFeb 17, 2021Andrew JosephBy Andrew Josephbookmark_bordersharemore_vert