But I work out and I know my body fairly well so I was pretty sure it wasn't flu.
And, though a flu shot won't give you the flu, its protection doesn't kick in for two weeks from the time of injection.
"I walked in and said 'I'm from Mexico but I don't have Swine flu', " she says, joking.
Around the same time Chiron, one of the world's largest vaccine suppliers, announced it couldn't ship 4 million doses of flu vaccine because they didn't meet sterility standards.
Although its protective action won't take effect for about two weeks, the flu season hasn't peaked.
In the end, they couldn't prove that the flu shot helps the elderly survived the flu season.
Markel was tapped by the CDC to study what worked and what didn't during the 1918 flu disaster.
Perry's flu hasn't been confirmed as an H1N1 strain, but a third roommate, the first to get sick, they said, was diagnosed with H1N1.
H5N1 flu hasn't been reported in the U.S., but the virus has infected more than 600 people in other countries and appears to be resistant to traditional anti-viral treatments, researchers said.
If there is a huge amount of mild swine flu we don't know about, the proportion of cases that are serious is correspondingly reduced.
Global air travel is down 7.6% (the swine flu epidemic hasn't helped), and hotels in the U.S. and Europe are running well less than three-quarters full.
Nardini says they both slept better and had more energy, and she didn't get a cold or the flu all month as she usually does in the winter.
The flu epidemic didn't spare Hollywood as actor Tommy Lee Jones reportedly missed out of picking up his statue for outstanding male actor in a supporting role for "Lincoln" because he was sick.
Flu experts still don't know whether a significant number of patients are sick enough to spread the virus, despite not being feverish.
It isn't covered by basic Medicare like the flu vaccine, but instead falls under the Medicare drug benefit, with its complicated co-pay system.
She might have passed it off as a bout of the flu if it hadn't been for the tremendous pain in her upper back.
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The answer: The vaccine isn't a guarantee that you'll be flu-free.
While researchers haven't developed a vaccine to fight the new swine flu, it can be treated with antiviral drugs Tamiflu and Relenza, the same drugs used on the regular flu.
After Markel's findings were published in the Journal of the American Medical Association, Barry wrote a letter in response, saying it wasn't swift action but rather an earlier wave of mild flu, acting like a vaccination, that was probably responsible for New York's relatively low caseload.
I'm sure I've caught a cold or flu of some description, but I shouldn't complain really.
Getting a flu shot while you're healthy won't give you 100% protection, but it is your best bet.
Slippery Rock University isn't the only school making changes to graduation ceremonies because of swine flu fears.
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" 'Swine flu' gives a connotation that really it shouldn't have, and makes people wonder about eating pork, " said Minnesota Health Commissioner Dr. Sanne Magnan.
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Not only do we not know where we are going to be with swine flu in a few months time, we don't really know where we are.
Because most people infected with swine flu tend to recover on their own and don't suffer major problems afterwards, some people are tempted to dismiss the infection and think it's not serious.
The country's Ministry of Health had then moved to allay fears over the outbreak, saying that although further human bird flu cases were possible throughout China, there wouldn't be a large-scale outbreak, Xinhua and CCTV said.
One company, VaxInnate, is testing a universal flu vaccine that would work against all strains and wouldn't have to be taken every year.
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