A new oral antiseptic spray that is effective in killing 99.9% of infectious airborne germs could be the answer to fighting colds and flu, claim a research team from San Francisco.

The germ-killing oral spray -- Halo Oral Antiseptic -- creates a 'gum microbial barrier' that protects users from airborne germs such as influenza and rhinovirus, while also fighting respiratory illnesses.

"The glycerine and xanthan gum prevent the germs from entering a person's system and the [anti-infective agent] kills the germs once they're trapped there," explains Dr Esper, in a statement.

How does the oral spray work?

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  • Breathing Airborne Germs

    On an average day, you take about 17,280 breaths. This wouldn’t be an issue if we didn’t spend 90% of our time indoors. Everyone around us, whether they’re laughing, singing, talking, sneezing or coughing, helps to create an environment laden with airborne germs. Put another way, there are over 17,000 opportunities a day to breathe in other people’s airborne germs. A - Oropharynx B - Airborne germs (origin: sneeze, cough, breath)<a href="http://halogermdefense.com/how-it-works.html"></a> <a href="http://halogermdefense.com/how-it-works.html">Click here for more information</a>.

  • Using Halo

    <a href="http://halogermdefense.com/how-it-works.html"></a>Halo is a patent-pending oral spray that delivers a coating to the back of the oral cavity, providing sustained antiseptic action against airborne germs you breathe in. All it takes is three quick sprays to the back of the mouth, circulate and swallow. That’s it. You can feel free to eat, drink and go about your day. <a href="http://halogermdefense.com/how-it-works.html">Click here for more information</a>.

  • Sustained Germ-Killing Power

    What makes Halo so unique is that the patent-pending formula has been designed and clinically proven to kill airborne germs you breathe in for up to six hours with each dose. A - Cetylpyridinium chloride (germ killer) B - Halo formula keeps sustained antiseptic action in place <a href="http://halogermdefense.com/how-it-works.html">Click here for more information</a>.

The spray, which has been tested against clinical strains of 2009 pandemic H1N1 (swine flu), is already available in supermarkets in America.

During drug trials, when a person used three sprays of Halo, it destroyed airborne germs breathed in for up to six hours, even when they were eating and drinking.

"Exposure to airborne germs is inevitable – especially in crowded environments and when traveling," said co-author, Dr Ghannoum, in a statement.

"Unlike other products that support the immune system or protect from germs on surfaces or hands, Halo is the first and only product of its kind to offer protection from airborne germs."

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The research by clinical researchers from the University Hospitals Case Medical Center was presented at the Interscience Conference on Antimicrobial Agents and Chemotherapy (ICAAC).

And if that doesn't work, here are some natural remedies for colds and flu..

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  • Natural Remedies For Colds And Flu

  • Garlic

    Garlic is well known for its immune system benefits and is best eaten raw or crushed in soups and hot drinks. Garlic combats snotty noses by releasing a compound called allicin, which is full of anti-bacterial and anti-fungal properties.

  • Celery

    If you're struggling to get a good night's sleep, tackle the problem with a stick of celery. Celery contains phthalidesm which has sedative powers and helps the body shut off and rest easy during the night.

  • Thyme

    A great natural remedy for respiratory disorders as it helps to release mucus from the body. It is also an antispasmodic which helps relax bronchial tubes, clearing the airways. Brew a cup of thyme tea or use it as an oil to treat chesty coughs or emphysema.

  • Leafy Greens

    Nosebleeds can be a symptom of cold and flu. Prevent this from happening by adding leafy greens to your diet. Packed with Vitamin K, greens fortify sensitive capillaries and help your blood clot quickly if you have a nose bleed.

  • Jujube Tea

    Jujube tea is rich in Vitamin C and great for the immune system and is widely used for relieving aching throat muscles.

  • Carrots

    Carrots are ideal for treating cold-induced headaches as they contain beta-carotene, which can reduce inflammation in the blood vessels of the brain. Chop them up and put in a stew, grate them on top of a salad or blend them to create a headache-friendly soup.

  • Nuts

    We already know that <a href="http://www.huffingtonpost.co.uk/2011/11/22/eating-protein-instead-of-sugar-keeps-you-awake_n_1107273.html?ref=uk-lifestyle" target="_hplink">proteins are best for boosting mid-afternoon energy slumps</a>, and they work just as well with energy-zapping colds and flu. A handful of raw nuts helps give the body a well needed energy boost, especially almonds and walnuts.

  • Lavender

    When the flu bug strikes, chances are the lack of sleep, appetite and constant nose blowing will begin to wear you down. Lavender is great for calming the nerves and relieving feelings of anxiety and stress. Use either dried lavender to scent the room or apply lavender oil on your pulse points for an instant calming boost.

  • Pineapple

    A low immune system can lead to weakened digestive system. Strengthen it by using pineapple which helps reduce intestinal inflammation and speeds the breakdown of protein, reducing gas and discomfort.