Home Coronavirus COVID-19 Study: Effectiveness of Pfizer and Moderna Vaccines Falls to 66% with Delta... Study: Effectiveness of Pfizer and Moderna Vaccines Falls to 66% with Delta Variant August 25, 2021 You are unauthorized to view this page. Username or E-mail Password Remember Me Forgot Password RELATED ARTICLESMORE FROM AUTHOR INEGI to Begin Mexico’s Intercensal Survey for 2025 U.S. Consulate in Guadalajara Announces Changes Amid Government Shutdown U.S. Government Shutdown: What It Means for Expats in Mexico Authorities Warn of New International Calling Scam Jalisco and Canada Explore Joint Project to Improve Water Quality