Influenza activity has risen to the highest levels so far this season and is continuing to increase in New Jersey and throughout the United States, data shows. Doctors expect this trend to continue.

New Jersey is one of 32 states and jurisdictions with “high” or “very high” levels of flu activity, according to the Centers for Disease Control and Prevention’s Dec. 30 report, which includes data through Dec. 20. This marks an increase from the 17 states reporting the week prior, according to USA TODAY.