Biden also announced that drugmaker Merck will help produce rival Johnson & Johnson’s newly approved one-shot vaccine, likening the partnership between the two drug companies to the spirit of national cooperation during World War II.

Axar.az reports citing foreign media that despite the stepped-up pace of vaccine production, the work of inoculating Americans could extend well into the summer, officials said, depending on both on the government’s capacity to deliver doses and Americans’ willingness to roll up their sleeves.

“We’re now on track to have enough vaccine supply for every adult in America by the end of May,” Biden said.