Home Current News 156 countries joined a major, WHO-led effort to develop and distribute coronavirus...NewsCurrent News156 countries joined a major, WHO-led effort to develop and distribute coronavirus vaccines. The US and China aren’t among them.September 3, 202062FacebookTwitterPinterestWhatsApp The US won’t participate in Covax, an international effort to develop and distribute a coronavirus vaccine. That could backfire.Source: yahoo.com/news