New U.S. COVID-19 cases and deaths tick higher, while CDC’s ‘real-world’ study shows Pfizer, Moderna vaccines reduce infection risk by 91%

And a new “real-world” study from the Centers for Disease Control and Prevention (CDC) showed that mRNA-based COVID-19 vaccines, from Pfizer Inc. PFE, -0.67% and partner BioNTech SE BNTX, -5.14% and from Moderna Inc. MRNA, -3.46%, reduced the risk of infection by 91% for fully vaccinated people.