Operation Warp Speed
Moderna COVID-19 vaccine appears to work as well in older adults in early study
Moderna's candidate, mRNA-1273, is already in late-stage human trials testing its ability to safely prevent infection
US strikes a $2 billion deal for 100 million doses of coronavirus vaccine
The agreement calls for US to pay Sanofi and GlaxoSmithKline up to $2.1 billion to supply it with enough vaccines for 50 million people
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