Health alert as flu becomes widespread across US

Nearly 42,000 cases of flu have been confirmed this flu season, with California among the hardest hit states, according to the Centers for Disease Control and Prevention.
3:00 | 01/08/18

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Transcript for Health alert as flu becomes widespread across US
George, now to that deadly flu and the number of cases spiking across the country. Look at this map from the CDC. It shows the flu spreading over the past three months. California one of the hardest hit states and ABC's kayna Whitworth is in Escondido with the details. Good morning, kayna. Reporter: Robin, good morning. Here in California 27 people under the age of 65 have died from the flu since October. And some hospitals are resorting to these, it's a triage tent set up outside just for flu patients. Doctors I spoke with say it's simply overwhelming. This morning, 48-year-old SHAWN burr row fighting for his life. He was severely critically ill and basically, you know, knocking on death's door. Reporter: The southern California man one of tens of thousands suffering with the nation's deadly flu crisis. So far this season, the CDC now saying the number of confirmed cases in the U.S. Extreme, nearly 42,000. California among the hardest hit states. It's going to last through February and probably early March. Reporter: The E.R. Here at the UCLA medical center in Santa Monica bringing in the extra staff as the Normal 140 patients a die skyrockets to 200 because of the flu. Partially behind the spike, the CDC estimating this year's flu vaccine is only 32% effective against the common h2n3 train and only 10% effective against other strains but still doctors suggest getting one. Now, it's important to remember here that the 42,000 reported cases of the flu might just be scratching the surface. Doctors fear that the real number is likely much higher and on top of that some pharmacies are running out of Tamiflu. It's prescription medication they think can shorten the duration. Robin. Just early January. Got a long way to go. All right, kayna, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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