In an effort to ramp up supply of the single dose vaccine more quickly, J and J's production has been slower than promised.

為了更快地增加單劑疫苗的供應量，J和J的生產速度比承諾的要慢。

Under its contract, the company was supposed to deliver 12 million doses by the end of February, but had less than four million ready to ship when the vaccine was authorized.

根據合同，該公司本應在2月底前交付1200萬劑疫苗，但在疫苗獲得授權時，只有不到400萬劑疫苗可以出貨。

On Saturday, the O.

上週六，奧。

J and J says it will be able to provide the full 100 million doses it had agreed to supply by its original mid year deadline.

J和J說，它將能夠在原定的年中最後期限前提供全部1億劑的供應。

More doses sooner could speed the US vaccination effort considerably because as a one dose vaccine, it is possible to inoculate twice as many people with the same number of shots.

更多的劑量越早越好，可以大大加快美國的疫苗接種工作，因為作為一劑疫苗，可以用同樣的注射次數為兩倍的人接種。

The other two US approved vaccines from Pfizer and Biontech and Moderna, require two doses.

美國準許的另外兩種輝瑞和Biontech和Moderna的疫苗，需要兩劑。