The 2019-2020 season is underway, reports the CDC, and all regions of the country are seeing elevated levels of flu-like illness (ILI).
Activity is being caused mostly by influenza B/Victoria viruses, which the CDC said is unusual for this time of year. A(H1N1) viruses are the next most common and are increasing in proportion relative to other influenza viruses in some regions.
CDC estimates that so far this season there have been at least 4.6 million flu illnesses, 39,000 hospitalizations and 2,100 deaths from flu.
Data collected in ILINet are used to produce a measure of ILI activity* by state.
During week 51 (ending Dec. 21, 2019), the CDC reports the following ILI activity levels:
High – District of Columbia, Puerto Rico, New York City, and 25 states (Alabama, Arizona, Colorado, Connecticut, Georgia, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maryland, Minnesota, Mississippi, Nebraska, New Jersey, New Mexico, North Carolina, Oklahoma, Oregon, South Carolina, Tennessee, Texas, Virginia, Washington, and Wisconsin)
Moderate – six states (California, Massachusetts, New York, Pennsylvania, Utah, and West Virginia)
Low – nine states (Arkansas, Hawaii, Iowa, Maine, Michigan, Nevada, Rhode Island, South Dakota, and Wyoming)
Minimal – six states (Delaware, Missouri, Montana, New Hampshire, Ohio, and Vermont)
Data were insufficient to calculate an ILI activity level from the U.S. Virgin Islands and four states (Alaska, Florida, Idaho, and North Dakota).
The CDC reminds Americans that it’s not too late to get vaccinated. Flu vaccination is always the best way to prevent flu and its potentially serious complications.
Antiviral medications are an important adjunct to flu vaccine in the control of influenza. Almost all (>99%) of the influenza viruses tested this season are susceptible to the four FDA-approved influenza antiviral medications recommended for use in the U.S. this season.