US biotech firm Moderna announced its experimental Covid-19 vaccine was almost 95% effective. Moderna became the second US company in a week to report results that far exceed expectations. US President Donald Trump also weighed in on Twitter to take credit. Moderna vaccine doesn't need ultra-cold storage like Pfizer, making it better for India. Last week, Pfizer and its German partner BioNTech had said their vaccine was 90% effective. Covid-19 infections have soared past 54 million globally with over 1.3 million deaths.
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