Gelonghui May 22| US stocks, vaccine concept stocks collectively rosewptpokeronline, among themwptpokeronline, Novavacs Medicine (NVAXwptpokeronline.US) rose more than 12%, Moderna(MRNAwptpokeronline.US), Vir Biotechnology(VIR.US) rose more than 9%, BioNTech(BNTX.US) rose nearly 9%, and Pfizer (PFE.US) rose more than 2%. Disease experts predict an increase in COVID-19 cases this summer, but are not expected to be as serious as in previous years.