The percentage of people visiting the doctor for influenza-like illness (ILI) last week jumped from 3.3% to 3.8%, a sign that the flu season is in full effect across much of the United States, according to today’s weekly FluView update from the Centers for Disease Control and Prevention (CDC).

All 10 geographic regions of the country recorded high ILI activity for the fourth week of 2019.

New York City and 23 states reported high ILI, compared with 18 states the previous week. Puerto Rico and 10 states are experiencing moderate ILI, and the District of Columbia and 13 states are reporting low ILI.

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See also:

Feb 1 CDC FluView

Feb 1 CDC FluView summary