This year's flu season has already killed 53 children and hospitals are overflowing with patients. Authorities are warning that a few weeks are still left and everyone should take precautions.

New York City Health Commissioner Dr. Mary Bassett said at a press conference Tuesday, "The flu is prevalent in every single state of the continental US."

[What you can do to help stay flu-free]

The Centers for Disease Control reports that 14,676 people have been hospitalized with the flu since the season began in October. That's double the amount last year and the highest number recorded since the government started tracking it in 2010.

Dr. Donald Curtis, a physician at Patient First Neighborhood Medical Center in Virginia Beach, told CBN News that patients have similar complaints. "The types of symptoms we're seeing—dry cough, muscle ache, fevers, headaches, quick onset of the symptoms," he explained.

Sixteen children died from the flu last week, including seven-year-old Savanna Jessie of Columbus, Indiana. She tested positive for the flu and died just one day after being rushed to the hospital. Courtney Hargett, her aunt, said "everybody is devastated. You never expect this to happen to you."

Some schools are shutting down for days at a time to stop the spread. Holy Angels Catholic School in Aurora, Illinois closed its doors after more than a quarter of its students got sick. In Alabama, the Marshall County School District closed after both students and staff became ill.

Tony Simmons, the school board vice president explained, "Our hospitals are filled. They don't even have rooms for our children. This way our children can stay home, get healed and we can get them back in school."

"The effectiveness [of the flu vaccine] is 30 percent," said Bassett. It means that it reduces your chance of getting the flu by one-third. That's not zero. What is zero is not getting the vaccine protection."

Doctors also recommend avoiding people with the flu because they can breathe the virus out in particles that hover in the air. They suggest washing hands frequently since the virus can live on hard surfaces up to a day. Probiotics, adequate sleep and stress management can also help to strengthen the immune system.

Most flu seasons last up to 20 weeks. Authorities say this season still has several more weeks to go.

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