In new breakthrough, Moderna's Covid vaccine nearly 95% effective

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. Moderna released early results from a clinical trial with more than 30,000 participants, after American pharmaceutical company Pfizer and its German partner BioNTech last week said their vaccine was 90 percent effective.