Why the three biggest vaccine makers failed on Covid-19
爲什麼三大疫苗製造商折戟新冠疫苗

GlaxoSmithKline, Merck and Sanofi are left playing catch-up to upstarts with new technology
葛蘭素史克、默克和賽諾菲，現在都只能望著那些擁有新技術的新貴絕塵而去。