The U.S. surpassed 10 million confirmed COVID-19 cases on Monday, according to Johns Hopkins data.Why it matters: The U.S. has reported over 100,000 new coronavirus cases every day since last Wednesday, when it first passed the threshold, per the COVID Tracking Project. The big picture: COVID-19 hospitalizations have risen by 10,000 since Oct. 30, and the seven-day average of deaths from the virus reported by states has increased 36% in the past three weeks, the COVID Tracking Project notes.One in every 462 people in the U.S. tested positive for the virus in the week leading up to Saturday.The 10 million-case milestone comes the same day that pharmaceutical giant Pfizer announced its vaccine trial was effective in preventing COVID-19 infections in 90% of previously uninfected people and did not produce any serious safety concerns.Go deeper: Biden unveils coronavirus crisis team tasked with curbing surging cases