An Operation Warp Speed official on Friday (Oct. 9) said the federal government is on track to have a hundred million or more doses of COVID-19 vaccine manufactured by year-end -- enough to vaccinate the most vulnerable Americans -- and that there could be upwards of 700 million total doses available by March or April 2021. The official reiterated, however, that distribution timing will depend on when vaccines get emergency use authorization or approval from FDA and how many vaccines...