美国斥资近20亿美元签上亿剂疫苗合同_时事

美国斥资近20亿美元签上亿剂疫苗合同

The Pfizer/BioNTech candidate is one of the most advanced of over 150 vaccines being developed against COVID-19, which has claimed more than 600,000 lives globally and crippled economies.

这种候选疫苗是正在研发的150多种新冠肺炎疫苗中最先进的一种。新冠肺炎已经在全球夺去了60多万人的生命，并给经济造成严重影响。

The vaccine utilizes the chemical messenger RNA to instruct cells to make proteins that mimic the surface of the coronavirus, which the immune system sees as a foreign invader and mounts an attack. Although the technology has been around for years, there has never been an approved messenger RNA (mRNA)vaccine.

这种疫苗利用化学信使RNA来命令细胞制造模仿冠状病毒表面的蛋白质，免疫系统将其视为外来入侵者并发动攻击。尽管这项技术已经存在多年，但还没有一种被批准的信使RNA疫苗。

The Trump administration has agreed to spend billions of dollars for the development and procurement of potential vaccines under its Operation Warp Speed program.

特朗普政府已经同意花费数十亿美元通过“曲速行动”项目来研发和采购潜在的疫苗。

The aim is to produce vaccines that can end the pandemic by protecting billions of people from infection or severe illness, and governments have signed deals with drugmakers to secure supplies of various candidates. Whether any will succeed remains far from clear.