NVIC Vaccine News

Getting A Flu Shot: No Guarantee It Will Work

By Barbara Loe Fisher
Published February 21, 2017 in Infectious Diseases & Vaccines

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Like a lot of people, in January when I suddenly developed a high fever (101 F), body aches, fatigue, nasal congestion and cough, I thought for sure it was influenza, which I had not experienced for decades. Turns out, according to a recently released CDC report, in the 2016-2017 flu season the odds are only about one in 10 that flu like illness symptoms are, in fact, caused by type A or B influenza.

On February 17, 2017, the Centers for Disease Control published an update on influenza activity in the U.S. for four months between Oct. 2, 2016 and Feb. 4, 2017.1 The new news is the CDC found that over the past four months: 

  • Influenza A (H3N2) viruses accounted for the vast majority of all public health lab confirmed influenza cases;
  • Out of nearly 393,000 respiratory illness lab specimens tested in the U.S., only about 38,000 cases – or 10 percent - were positive for type A or B influenza;
  • Persons over age 65 accounted for more than 60 percent of lab confirmed influenza-associated hospitalizations;
  • About 6,800 hospitalized cases of lab confirmed influenza have been reported so far and it is estimated that about 95 percent had at least one high risk medical condition, such as heart disease; metabolic disorder or obesity, with more than half of the children hospitalized also suffering with asthma, chronic lung disease or a neurological disorder;
  • About 5 to 8 percent of all U.S. deaths reported over the past four months have been attributed to pneumonia or influenza, with 20 reported pediatric deaths associated with type A or B influenza;
  • The influenza strains included in this year’s flu vaccine are closely matched to the most prevalent influenza strains reported to be circulating in the U.S. Out of 484 different influenza viruses the CDC tested, 96 to 100 percent of influenza A viruses and 91 to 100 percent of influenza B viruses were antigenically similar to components of the 2016/2017 influenza vaccine.
flu vaccine syringe

CDC: This Year’s Flu Shot Only 43 Percent Effective Against Most Prevalent Strain

The old news is that, even when this year’s seasonal flu shot contains the same influenza strains that are circulating - like in most years2 - it is less than 50 percent effective across all age groups in preventing a trip to the doctor’s office for lab confirmed influenza. The vaccine is only 43 percent effective in preventing influenza A (H3N2), the most prevalent strain this year.

How many people following doctors’ orders and rolling up their sleeves to get an annual flu shot this year understand it has a 57 percent failure rate for the most common influenza strain circulating? That is like telling someone to buy a car with seat belts that fail 57 percent of the time!

But, beyond that, how many people understand that only 10 percent of all flu-like illness out there this year is actually influenza?

There are no guarantees in life. That goes for vaccination, too.

Vaccines Often Fail to Prevent Infection and Transmission

While many people believe that getting vaccinated guarantees you won’t get sick or make anyone else sick, vaccines do not always work as well as we have been taught to believe they do.3

Take influenza vaccines, for example. Influenza is a viral infection that causes type A or B influenza, which can have serious pneumonia complications for some people, like the elderly.4

flu masks

Doctors routinely give annual flu shots to children and adults, including pregnant women.5 6 7 And in many states, health care and day care workers are required to get an annual flu shot or they are fired from their jobs.8 9 10

But public health officials admit that influenza vaccines fail to prevent influenza more than half the time.11 And in some years, flu shots do not prevent influenza at all because they don’t contain the influenza strains that are making people sick.12

Plus, you can get a flu shot and still get infected with influenza but only have minor symptoms or no symptoms at all.13 Even if you have been vaccinated, you can be a silent carrier of influenza and infect other people without even knowing it.

This is something to keep in mind when you are in a doctor’s office or hospital, where all employees have been vaccinated and assume they are protected, but where influenza could still be circulating among the staff.

Most Flu Like Illness Not Influenza

But perhaps the biggest misconception of all is that during the flu season, every time you get a fever, headache, sore throat, cough, and a tired, achy feeling all over, you probably have influenza that could have been prevented with a flu shot.

The truth is that, when doctors get suspected cases of influenza tested in labs, more than 70 percent of the time it is not type A or B influenza but another virus or bacteria causing a respiratory flu-like illness that is mistaken for influenza.14 15

When beliefs about vaccine effectiveness are not grounded in truth, they can put you, your family and people you know at risk.

Whether you have been vaccinated or not, if you have even mild symptoms of being sick, stay away from close contact with infants, pregnant women and people who are immune compromised until you are well.

Learn More About Vaccines and Diseases

At NVIC.org, learn more about vaccines, diseases and the human right to informed consent to medical risk taking.

Empower yourself today with well-referenced information that can help you make educated decisions about vaccination.

It’s your health. Your family. Your choice.

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1 CDC. Update: Influenza Activity – United States, October 2, 2016 – February 4, 2017.MMWR Feb. 17, 2017; 66(6): 159-166.

2 CDC. Seasonal Influenza Vaccine Effectiveness 2005-2015. Dec. 18, 2015.

3 Fisher BL. Pertussis Microbe Outsmarts the Vaccines As Experts Argue About Why. NVIC Newsletter Mar. 27, 2016.

4 Agency for Healthcare Research and Quality. Influenza Most Deadly for the Very Elderly. AHRQ Press Release Nov. 7, 2006.

5 CDC. Prevention and Control of Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices (ACIP) – United States, 2016-2017 Influenza Season. MMWR Aug. 26, 2016; 65(5): 1-54.

6 CDC. Guidelines for Vaccinating Pregnant Women. August 2016.

7 Fisher BL. Vaccination During Pregnancy: Is It Safe?NVIC Newsletter Nov. 9, 2013.

8 Fisher BL. Women, Vaccines and Bodily Integrity. NVIC Newsletter Jan. 24, 2013.

9 DeSerres G, Skowronski DM, War BJ et al. Influenza Vaccination of Healthcare Workers: Critical Analysis of the Evidence for Patient Benefit Underpinning Policies of Enforcement.PLOS One Jan. 27, 2017.

10 Lin RG, Xia R. Vaccines required for daycare workers under new California law.Los Angeles Times Oct. 13, 2015.

11 Fisher BL. CDC Admits Flu Shots Are Effective Half the Time. NVIC Newsletter Apr. 26, 2017.

12 Fisher BL. Flu Vaccine: Missing the Mark. The Vaccine Reaction Spring 2004.

13 The Lancet. Three-quarters of people with seasonal and pandemic flu have no symptoms.Eurekaalert Mar. 16, 2014.

14 CDC. Update: Influenza Activity – United States, October 4, 2015 – February 6, 2016.MMWR Feb. 19, 2016; 65(6): 146-153.

15 CDC. Influenza Activity – United States, 2014-2015 Season and Composition of 2015-2016 Influenza Vaccine.MMWR June 5, 2015; 64(21): 583-590.

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5 Responses to "Getting A Flu Shot: No Guarantee It Will Work"
Commenter Name
Posted: 2/28/2017 11:05:54 AM
"How many people following doctors' orders and rolling up their sleeves to get an annual flu shot this year understand it has a 67 percent failure rate for the most common influenza strain circulating? That is like telling someone to buy a car with seat belts that fail 67 percent of the time!" Sorry Barb, but that's crazy. Consequences of the failure of a flu shot cannot be compared to the consequences of a failed seat belt. You don't encounter instant death from getting the flu.
Commenter Name
Posted: 2/28/2017 12:01:46 PM
Thanks for this great little video. I am one of the very few (6 total) at the medical group where I work who do not get the flu shot. One of my co-workers got the shot this year, got the flu and ended up in the hospital. So much for effectiveness. They are finally being honest with us in telling us that the number of employees who get the shots are reported to the federal government each year. They get money in return. A cozy arrangement.
Commenter Name
D. Smith
Posted: 2/28/2017 7:20:19 PM
@ Loretta: Just because a seatbelt fails, it doesn't mean instant death either. Go back to your troll cave. One thing not mentioned in the article is that flu shots shed and can cause illness to immune compromised people who are just standing next to that person for any length of time.
Commenter Name
Jesse Carnes
Posted: 2/28/2017 8:00:15 PM
Barbara Loe . . . you are correct. More correct than you may realise. Cheque out this video by Dr. Russell Blaylock. He is a board-cert. Pediatric Neuro-Surgeon. He indicates that flu injections only work about 13% of the time. In may cases, the recipients GET the flu from the injection. The vaccine's adjuvants SUPPRESS a person's immune system and PRECIPITATES a case of the flu in many cases. Aluminium hydrox. is a dangerous immune system suppressant and this does not even take into account the formaldehyde, stealth viruses, pesta viruses and polysorbate 80 in many of these injections. Quite dangerous. I came across one scientist who MADE vaccines for a living, and he said "I would never never give any of my childrens these dangerous things.
Commenter Name
Keyna Welenc
Posted: 4/6/2018 10:58:25 PM
After I begged my mother NEVER to get a flu shot, she said her Doctor talked her into getting a flu shot - four weeks later she died (we just buried her 2 weeks ago). The Doctor said the flu shot failed to protect her from the strain she died from. The entire system is corrupt. DefundCDC

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