Eggs are the reason for ineffective flu vaccines

The production of flu vaccines isn’t perfect, and there’s one unexpected factor behind that -- eggs.

A new study published in PNAS suggests the reason why last winter’s flu vaccine was only moderately effective was because of chicken eggs.

According to STAT, flu vaccines are primarily developed from antigens grown in eggs from hens. Before being put into the vaccine, those antigens are inactivated or killed.

But once they’re growing in the eggs, those human vaccine strains can often mutate.

And the problem is, last year’s H3N2 vaccine had a mutation.

Leading humans and ferrets exposed to the vaccine to produce antibodies that weren’t effective in fighting that type of flu.

And STAT suggests this year’s flu vaccine has that same H3N2 component.

The director of the World Health Organization’s Collaborating Centres for influenza  in Australia told STAT, “We need to do a lot to improve existing vaccines. And getting away from eggs would be very valuable.”

RELATED: Best drinks to fight the flu

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The Best Drinks to Fight the Flu
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The Best Drinks to Fight the Flu

Water

This shouldn't be a surprise: the ultimate clear liquid, water is the truest drink to keep you hydrated. Don't like the taste? Add a sugar-free flavor packet, like Crystal Light, to your glass to encourage more guzzling.
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Ice Pops and Ice Cubes

How do you think ice cubes became the 25th most searched recipe in America, after all? Ice pops, or ice cubes if your freezer just happens to be void of summer’s best treat, are two of the best defenses against dehydration. WebMD advises to look for ice pops made with 100 percent fruit juices to get a 2-in-1 fight against the flu – hydration, plus vitamins.

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Black Tea

Mother Nature Network notes one Harvard study that shows black tea as the ultimate immunity booster. Drinking five cups of black tea per day for two weeks nearly quadrupled a person’s immunity system – so if tea isn’t a part of your diet already, you germaphobes, you should get on it. Thanks to black tea’s abundance of theanine, flavonoids (antioxidant-like compounds), catechins (compounds that fight free radicals in the body), it’s been proven to fight off the flu.

Credit: Flickr/ HinduCindu

Ginger Tea

Ginger may as well be called a superfood, seeing as how much it can keep the flu at bay. Most people reach for a ginger ale when tummy troubles come about, and we can see why – it’s been a part of Chinese herbal medicine for more than 2,000 years to relieve digestion problems and nausea. Plus, ginger can help detox the body by inducing sweating (not the most fun symptom of the flu) to get rid of the body’s toxins. And ginger’s analgesic and anti-inflammatory properties relieve aches and pains that come with the flu. Convinced? Fortunately, ginger tea is simple to make: the University of Maryland Medical Center advises adding 2 tablespoons of ground ginger or ginger root to a cup of boiling water. (We particularly like this honey, lemon, and ginger flu-fighting concoction from Simple Green Smoothies, too.)

Credit: Flickr/ Ali Fayre

Chicken Broth

Chicken broth may be your best remedy against a cold and the flu. Vitamins and protein? Check. Hydration power? Check. Anti-inflammatory properties? Check. Congestion-fighting properties? Check. The most popular study on chicken broth, from the University of Nebraska, showed that chicken soup helped reduce upper respiratory cold symptoms and helped build up the nose’s protective cilia, hair-like substances in the nose that prevent contagions – like that pesky flu bug – from entering the body. While you may need a few days to feel well enough to eat a hearty chicken soup, the University of Nebraska provides the ultimate chicken noodle soup recipe. A scientifically-backed recipe to feel better? Not even your mom’s homemade soup-made-with-love can top that.

Credit: Flickr/ Muffet
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