The federal government has reached an agreement with Moderna for additional supply of COVID-19 vaccines until 2024. The agreement secures Canada’s access to 40 million doses of the mRNA vaccine, with the option to purchase an additional 65 million shots. “We’ve reached an agreement with Moderna for additional supply of its COVID-19 vaccine for 2022 and 2023, with an option to extend into 2024,” Prime Minister Justin Trudeau tweeted Saturday. The announcement comes several days after the Massachusetts-based drug maker confirmed it had signed a memorandum of understanding with the federal government to build an mRNA vaccine manufacturing plant in Canada. Moderna CEO Stephane Bancel said Tuesday that the agreement will give Canada access to Moderna’s mRNA “development engine” and allow the country priority access to the doses. He said Canada can also ask Moderna to shift its production lines to respond to a new or emerging threat.