Flu Season Was One of Mildest on Record, CDC Confirms

THURSDAY, June 7 (HealthDay News) — This past flu season started
later than most and was one of the mildest on record, health officials
reported Thursday.

Compared with recent flu seasons, this one saw fewer people going to
their doctor with flu symptoms, along with fewer hospitalizations and
deaths from flu, according to the U.S. Centers for Disease Control and
Prevention.

Dr. Joseph Bresee, chief of the epidemiology and prevention branch in
the CDC‘s influenza division, said there are several factors that might
explain the mild flu season.

“The viruses that circulated this year were similar to the viruses that
circulated last year,” he said. “So, there are probably a lot of people in
the United States [who were] exposed to these viruses before, so the level
of immunity of the population was probably fairly high going into the
year.”

In addition, there were lots of vaccines used in the last couple of
years and the vaccines haven’t changed, which is unusual for flu, so a lot
of people have been vaccinated, Bresee said.

It was also a very mild winter, which appears to slow the spread of
flu, he said.

But next flu season could be entirely different, Bresee cautioned.

“Flu viruses change. We never know whether it’s going to be severe or
mild. The fact that we had a mild flu season this year doesn’t mean that
next year you will see a mild season as well,” he explained.

“Flu is unpredictable, it’s serious, and you ought to get vaccinated
against the flu that comes around next year,” Bresee added.

The report was published in the June 8 issue of the CDC’s Morbidity
and Mortality Weekly Report
.

The number of children who died from flu was the lowest since the CDC
started collecting data on this in the 2004-2005 season. This season, 26
children died from the complications of flu.

During the 2010-2011 season, 122 children died. During the 2009
pandemic a total of 348 children died, and there were 67 deaths during the
2008-2009 season.

The most common flu virus this season was influenza A (H3N2). But,
influenza A (H1N1), the pandemic virus from 2009, and influenza B viruses
also circulated widely.

Most of these virus strains were similar to those included in this
year’s vaccine. In addition, antiviral drugs were effective against these
strains, the CDC researchers noted.

The CDC urges everyone to get an annual flu shot because it is the most
effective way of preventing flu. Vaccination is recommended for almost
everyone aged 6 months or older.

More information

For more information on flu, visit the U.S. Centers for Disease
Control and Prevention
.

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