As the number of U.S. COVID-19 cases topped 10 million, President-elect Joe Biden gave a nationally televised address Monday warning of a “dark winter” ahead and pleading for the use of face masks.

President-elect Joe Biden: “I implore you: Wear a mask. Do it for yourself. Do it for your neighbor. A mask is not a political statement, but it is a good way to start pulling the country together. I want to be very clear: The goal of mask wearing is not to make your life less comfortable. It’s to take something — or take something away from you. It’s to give something back to all of us: a normal life.”

This comes as two more close associates to President Trump have tested positive for the virus: Housing Secretary Ben Carson and the attorney David Bossie, who is leading Trump’s post-election legal challenges.

Meanwhile, global stocks soared on Monday following news from Pfizer that early data from a large clinical trial shows its coronavirus vaccine cut symptomatic COVID-19 cases by more than 90%.