Overnight Health Care: Pfizer vaccine more than 90 percent effective in interim analysis | Biden lauds Pfizer news, but urges caution | US surpasses 10 million COVID-19 infections

Welcome to Monday’s Overnight Health Care. There’s some good news on the vaccine front, but the U.S. has now confirmed 10 million COVID-19 cases. And President-elect Joe Biden is getting a head start on his coronavirus response. Let’s…