Trump has pressed health officials to accelerate the vaccine timeline and deliver one by the end of the year. At a news conference Wednesday, the president said that the vaccine “could be announced in October” and that as soon as it is available it can be distributed “immediately” to the general public. “To the general public immediately — when we go, we go,” he said. Story continues below advertisement If a vaccine is swiftly approved, it could upend the campaign. However, experts have said it is unlikely that a vaccine could be approved and come into full circulation before the Nov. 3 election.