"Pandemic fatigue" is the main reason for the record rises in COVID-19 cases the United States has seen this month, U.S. Surgeon General Jerome Adams told NPR in an interview broadcast Saturday.Why it matters: The U.S. is on track for its worst month of coronavirus cases since the pandemic began. The latest Johns Hopkins data shows the U.S. broke the world record for the number of new cases again on Friday, with 177,224 people testing positive. Since first surpassing 100,000 infections in a single day on Nov. 5, the country has set recorded new cases well over the 100,000-mark on several occasions this month — including over the past four days.Health officials are concerned infection numbers will accelerate during the Thanksgiving holiday.What he's saying: "The virus hit different places of the country at different points," Adams told NPR."And so you've had people who've been doing these things since February, March, April, but they didn't really start to see the wave until later on. And they're just plain tired."Adams urged people mark Thanksgiving with members of their own household only and celebrate with others virtually.Go deeper: How "COVID fatigue" clouds judgment and endangers public health