Moderna plans to have 100 to 125 million doses of its Covid-19 vaccine available in the first quarter of 2021, the vast majority of which will go to the United States, the biotechnology company announced.

Between 85 and 100 million of the doses will be distributed in the United States, with the rest of the world receiving the remaining 15 to 25 million, the Cambridge, Massachusetts-based company said in a statement.

Moderna also confirmed that it expects to have 20 million vaccine doses available in the US by the end of 2020, according to AFP.

The company has been working on its American supply and production chain for months, in preparation for the vaccine's expected emergency approval by US Food and Drug Administration (FDA).For all countries outside the United States, production will take place in Switzerland.