But health officials stress that getting a shot any time during flu season is better than not getting one at all.
"It's important to get the flu vaccine as soon as it's available in the community", said Dr. Rehm.
The flu season can last up until spring and if you've ever had the flu you wouldn't want to get again.
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The investigators reported that the overall adjusted flu vaccine effectiveness (VE) for preventing flu-associated hospitalizations in all ages was 23.3% (95% CI: 2.9%-39.4%), with slightly less effectiveness observed in those who were 65 years of age or older (VE: 19.4%; 95% CI: -7.8%-39.8%).
During the 2017/18 flu season, 64 people died from the flu in Alberta. So many people caught the flu that some hospitals and pharmacies across the US ran out of antiviral drugs, Alabama declared a state of emergency and a school district in Arkansas closed all 10 of its schools.
"Some people might feel a bit under the weather after a flu shot - muscle aches or an achy arm at the injection site, but it is not possible to contract the flu from a flu shot", says Webster.
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When Should You Get a Flu Shot?
Given that more than twice as many people died from the flu than from vehicle accidents a year ago, it makes sense to improve your odds. Patients whose tests came back as positive for the virus were considered to be cases, while those whose tests came back negative served as the matched controls. The flu vaccine will kill or weaken viruses to stop any sickness. Unlike most flu vaccine, which is made from dead virus material that cannot lead to infection, the nasal mist is made from live flu virus that can cause an infection and is not recommended for people with certain medical conditions and sensitivities. It's important to note, however, that studies have shown only 1 to 2 percent of people who get the flu shot will experience a negative reaction.
Similar vaccines grown with yeast are available on the market for human papillomavirus, or HPV, and hepatitis B. Sanofi, the French pharmaceutical giant, makes a seasonal flu vaccine with recombinant DNA technology and protein, a somewhat similar process to Medicago's. And people who may have an allergy to the vaccine.
Both Essentia and St. Luke's give those who are 65 and older the high-dose vaccine. The vaccine is the best protection against this unpredictable virus, it can also help to reduce the impact on health services at a time of year they're needed most.
She stressed that although children get sick more often, but first and foremost the Singapore strain risky for seniors. CDC recommends that people get a flu vaccine by the end of October.
In addition to the vaccination, you can help fend off the flu by keeping your immune defenses strong. These include people who have had a severe allergic reaction to chicken eggs, had a severe reaction to an influenza vaccination in the past, developed Guillain-Barre' Syndrome (GBS) within six weeks of getting the influenza vaccine, children less than six months of age, or people who have a moderate or severe illness with a fever until symptoms lessen.