Ease of manufacturing scale up may determine which candidates advance furthest in the US government’s partnership with industry to speed COVID-19 vaccines to patients. Senior government officials also discussed approval standards, how a vaccine would be distributed, and how much the government and Americans could pay in a 16 June press call. The ability for a COVID-19 vaccine to be manufactured quickly and at scale will be a key factor in determining which potential candidates advance through Operation Warp Speed,…