"We are optimistic that we will have enough vaccine very soon ... I am sure that in the next 3 weeks we will be able to vaccinate people at a rate of 1 million (doses -

RT

) per day or even more," RIA Novosti quotes Biden.

He explained that the number of doses is not equal to the number of people vaccinated because the vaccines approved for use in the United States require two doses.

The American leader also noted that thanks to vaccination, the United States could "make significant progress" towards group immunity from COVID-19 by the summer.

Earlier, Biden said that the number of victims of coronavirus infection in the United States could exceed the threshold of 500 thousand in February.