Ultim'ora US warned variants could wipe out all Covid-19 progress By Lombardia Salute On Mar 1, 2021 31 Share - Advertisement - US warned variants could wipe out all Covid-19 progress www.cnn.com 2021-03-01 22:27:39 COVID19progressvariantswarnedwipe 31 Share FacebookTwitterGoogle+ReddItWhatsAppPinterestE-mail