https://www.siliconvalley.com/2020/09/04/a-coronavirus-vaccine-by-election-day-probably-not-heres-why/

The US Centers for Disease Control and Prevention is asking states to get ready to distribute a coronavirus vaccine by as early as next month. The CEO of Pfizer says he thinks it’s possible his company will have enough data to ask the US Food and Drug Administration for authorization by October.

And officials inside the FDA have told CNN that Trump has consistently pressed agencies to speed up their timeline for developing a vaccine so he can have a vaccine victory by Election Day.