Moderna's Covid-19 vaccine nearly 95% effective, trials show

Documents from the Moderna Research Center of America, in Hollywood, Florida, on August 13, 2020.
Documents from the Moderna Research Center of America, in Hollywood, Florida, on August 13, 2020. CHANDAN KHANNA AFP

US biotech firm Moderna on Monday announced its experimental vaccine against Covid-19 was almost 95 percent effective, marking a second major breakthrough in the quest to end the pandemic. 

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