CDC to Americans: Get your flu shot, now

There's been a drop in the number of people getting the flu vaccination, a trend that's worrying infectious disease specialists.

"Flu is serious. Flu is unpredictable," Dr. Thomas Frieden, director of the Centers for Disease Control and Prevention, told reporters Thursday. "Flu often does not get enough respect." In 2015, about 45 percent of the U.S. population received vaccinations, down 1.5 percentage points from 2014, the CDC reports. The largest decrease was in people 50 and up — there was a 3.4 percent drop among people between the ages of 50 and 64, and a 3.3 percent decline among people 65 and over. While most people are hit with mild symptoms, the flu kills 100 children every year, and the elderly are among the most vulnerable to the virus.

While the CDC is urging Americans to get a flu shot now, they are not recommending the nasal spray vaccine, which is often used on kids, due to questions surrounding the vaccine's effectiveness. This year, there are also two new vaccines, NPR reports; one protects against four strains of the flu rather than three, and the other has an "adjuvant," which increases its effectiveness. The CDC expects as many as 168 million vaccines will be available, so "there's plenty for everybody," Frieden said.

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