Texas had more than 4.4 million and Florida topped 3.9 million as of Sunday.
Health officials say a new outbreak that is straining California's medical system is due to gatherings at Thanksgiving.
A tally by Johns Hopkins University on Thursday morning showed the nation’s most populous state has a total of 2,010,157 infections.
New York has become the first state to ban the declawing of cats. Animal welfare advocates and many veterinarians say the once-common operation is unnecessary and cruel.
New York's state Senate has passed a bill that would make the state the first in the U.S. to ban cat declawing operations.
Florida will become the first state to issue what's essentially a birth certificate to women who've had miscarriages.
Gov. Jerry Brown has signed legislation imposing the nation's first statewide ban on single-use plastic bags. Plastic bags will be phased out of large grocery stores starting next year and convenience stores and pharmacies in 2016.