HEALTHY LIVING
06/26/2013 02:15 pm ET Updated Aug 26, 2013

Spit Holds Key To Why Seniors Seem To Be More Protected Against Pandemic Flu

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By Christopher Intagliata
(Click here for the original article)

Seasonal flu typically hits senior citizens harder than most other age groups. In fact, some 90 percent of flu-related deaths are estimated to occur in adults 65 and older. But with pandemic influenzas, like bird or swine flu, it's a different story.

Take the 2009 H1N1 flu. In that outbreak, adults over 65 actually suffered the fewest infections of any age group. That anomaly suggests they might have some sort of built-in immunity. Now researchers say the seniors' secret may be in their spit.

Researchers sampled saliva from 180 children, adult and elderly volunteers. Then they isolated proteins from the saliva, and tested how well the inhibitory proteins stuck to two strains of H9N2 bird flu.

Turns out elderly men and women had significantly more such proteins that interfere with the flu virus--which researchers say could boost the seniors' resistance to bird flu. Those results appear in the Journal of Proteome Research. [Yannan Qin et al., Age- and Sex-Associated Differences in the Glycopatterns of Human Salivary Glycoproteins and Their Roles against Influenza A Virus

The next step, researchers say, is to develop an oral or nasal spray based on these proteins. Which might give people of all ages a chance to send the flu a lethal loogie.

ALSO ON HUFFPOST:

  • Hand Washing
    There may be no more promoted solution to avoiding the flu this year (besides the flu shot, of course) than diligent hand washing. As many as 80 percent of infections are transmitted via contact like sneezing, coughing or touching surfaces that have been sneezed or coughed on, says Tierno, and then touching "your mouth, eyes or nose, which are the conduits of viruses into the body." He recommends scrubbing before eating, drinking or touching your face, and disinfecting shared surfaces in the home (like the bathroom) and the office, like phones, computers and fridge door handles.
  • While you're off in dreamland, your body gets to work repairing cells and injuries you may have incurred during the normal day's wear and tear, says Tierno. Getting your seven to nine hours a night means your body can repair and heal itself and ward off infections. "If you don't get the appropriate sleep, that system is not operating and you're on a steady decline over time," he says. In fact, skimping on sleep is as disruptive to the immune system as stress, according to a 2012 study. And earlier research suggested that sleep patterns may play a role in a gene that helps fight off bacteria and viruses.
  • Getting your blood pumping regularly can increase the activity of a type of white blood cells that attacks viruses. Shoot for an hour a day, says Tierno -- but not necessarily all at once. "Even if it's walking around the office, up stairs, down stairs, to and from work -- it doesn't have to be continuous," he says.
  • Getting the proper amount of the right nutrients and minerals as part of a healthy diet "leaves the body in optimal condition to fight the battle," says Tierno. This means cutting back on sugary, fatty foods and upping your intake of vegetables, fruit and lean protein, he says. One of those nutrients that gets a particularly healthy reputation during cold and flu season is zinc, and for good reason. "Zinc interferes with viruses gaining full access to our cells," he says. "Zinc may block certain metabolic activity." While it's not the end-all cure, foods rich in zinc, like oysters and wheat germ, may offer some protection.
  • The anti-microbial properties of this pungent bulb (and its relative, the onion) can fight off certain bacteria and viruses, says Tierno, as can the compounds in other herbs and spices, like thyme. It's likely due to the compound allicin, which seems to block infections. Try it in your next bowl of soothing chicken soup!
  • Thankfully, most of us are inhabiting cozy-warm homes this winter, but those cranking radiators come with a downside. Indoor winter air is much dryer than our bodies would like. Without sufficient moisture, says Tierno, "immune system cells can't optimally work," so it's important to stay hydrated. (A humidifier can also help.)
  • Skipping Happy Hour
    Alcohol suppresses both the part of the immune system that protects you from coming down with something and the part that fights off the germs already in your system, so knocking a few too many back can put you at increased risk for catching the bug going around -- and having trouble kicking it.
  • A positive attitude can take you far -- even, maybe, to age 100. But along the way, a life of laughter and optimism could also help you sniffle through fewer bouts of the flu or colds. While there's much that's still not well understood about the process, it seems that certain immune cells are produced by a big belly laugh, says Tierno.
  • Massage
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    A favorite solution for de-stressing, massage can also help you stay physically healthy. While there's been little research into exactly how it works, massage certainly increases circulation, which may help promote the general "state of wellness in the body," says Tierno. "Nutrients are passed around better, the blood flow is better," he says. "It's a very useful thing to get a massage."
  • Sex
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    A 1999 study found that getting frisky a couple of times a week can boost immunoglobin A, an antibody that fights off colds. Just make sure your partner isn't already sick!
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