https://cvvr.hms.harvard.edu/wp-content/uploads/2020/06/GMA.jpg400400Morgana Souzahttps://cvvr.hms.harvard.edu/wp-content/uploads/2020/03/cvvr-header-banner-long-white-bg.pngMorgana Souza2021-07-01 08:28:442021-07-02 08:29:49Johnson & Johnson vaccine seems to stand up against delta variant, preliminary research suggests