President-elect Joe Biden said that "we just received positive news in this fight with announcement that there's been progress made toward a successful vaccine" — but added that the process must "be grounded in science and fully transparent."
He continued: "Soon the expectation is the FDA will run the process of rigorous reviews and approvals. And the process must also be grounded in science and fully transparent so the American people can have every confidence that any approved vaccine is safe and effective."
Biden added that even if a vaccine is approved it "will not be widely available for many months yet to come."
His remarks came during a speech from Wilmington, Delaware, after being briefed by his newly formed coronavirus advisory board.
More context: Earlier today, drug maker Pfizer said early analysis shows its Covid-19 vaccine is more than 90% effective.
Biden addresses Pfizer vaccine update: