Pfizer Inc expects to deliver more than 13 million doses of its Covid-19 vaccine per week to the United States by the middle of March, more than doubling its shipments from early February, a top Pfizer executive said.

Pfizer has shipped around 40 million doses to locations across the United States so far and is on track to deliver 120 million doses of its two-dose regimen by the end of March, said John Young, Pfizer’s chief business officer, Reuters reports.

He added that Pfizer is also prepared to provide a total of 300 million shots to the United States by the end of July and has raised global production expectations for 2021 to at least 2 billion doses.