Moderna says it is on track to make 20 million doses of coronavirus vaccine by year-end

Moderna said Friday it can make 20 million doses of its coronavirus vaccine by the end of October. By the end of 2021, the company anticipates it can manufacture as many as 500 million doses. CEO Stephane Bancel said this week that the company will likely know if the shot works by November. President Trump has expressed optimism that coronavirus vaccines could be ready before the November 3 election