The biggest COVID-19 story right now is the rise of new coronavirus strains, especially the highly contagious Delta variant. In this Motley Fool Live video recorded on June 30, 2021, Motley Fool contributors Keith Speights and Brian Orelli discuss these results and what they might mean for investors. Keith Speights: Moderna provided an update on Tuesday about how its COVID-19 vaccine generates neutralizing antibodies against several coronavirus variants, including most of the ones that have made the news recently.