From the linked report...
"In keeping with guidance from the Food and Drug Administration, the companies will not file for an emergency use authorization to distribute the vaccine until they reach another milestone: when half of the patients in their study have been observed for any safety issues for at least two months following their second dose. Pfizer expects to cross that threshold in the third week of November."
Additionally, there are significant challenges to be dealt with in the distribution/supply chain aspects of this medication.
One more thing...even with no 'hiccups', the vaccine won't be available for the general population until a few months from now...take a look at my reply to your earlier posting on the impending vaccine...there's much to be done by everyone in the interim.
Link: https://www.statnews.com/2020/11/09/covid-19-vaccine-from-pfizer-and-biontech-is-strongly-effective-early-data-from-large-trial-indicate/