Moderna says Covid booster shot generates promising immune response against variants found in South Africa, Brazil

Moderna says Covid booster shot generates promising immune response against variants found in South Africa, Brazil This is a developing news story. Please check back for updates: https://www.cnbc.com/2021/05/05/covid-booster-shot-moderna-says-vaccine-generates-promising-immune-response-against-variants.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