J&J says Covid booster shot is 94% effective in the U.S. when given two months after first dose

J&J says Covid booster shot is 94% effective in the U.S. when given two months after first dose This is a developing news story. Please check back for updates: https://www.cnbc.com/2021/09/21/jj-covid-vaccine-booster-shot-is-94percent-effective-when-given-at-two-months.html Follow @CNBCnow for breaking news and real-time market updates Unsubscribe Manage Newsletters Terms of Service Join the CNBC Panel   Digital Products Feedback Privacy Policy CNBC Events   © 2021 CNBC LLC. All rights reserved. A property of NBCUniversal. 900 Sylvan Avenue, Englewood Cliffs, NJ 07632 Data is a real-time snapshot *Data is delayed at least 15 minutes. Global Business and Financial News, Stock Quotes and Market Data and Analysis. Data also provided by THOMSON REUTERS