- In Santa Clara County, the average number of weekly cases rose during the month of December, primarily because of one weekly number that was unusually high. The number of new deaths hovered near one per week throughout the month. The number of people hospitalized gradually rose throughout the month. The number of daily ED visits rose by 50% in December.
- In California, the number of new cases rose somewhat in December. The number of new deaths per day fell somewhat.
- In the U.S., the average number of weekly cases rose during the month of December, primarily because of one weekly number that was unusually high. The number of new deaths fell slightly over the month. The number of hospitalizations rose sharply over the month.