The Flu Shot

Oct 12, 2018

By Trevor Shewfelt, Pharmacist at the Dauphin Clinic Pharmacy

Is being "Facebook Official" still a thing? A few years ago, if you announced on Facebook that you were "in a relationship" with someone, that was an important milestone in a relationship. How about "Wikipedia Official"? What does it mean if Wikipedia rejects a page about your scientific achievements because you aren't a noteworthy enough scientist? Well if I was Donna Strickland, I think I'd ask Jimmy Wales, Wikipedia co-founder, to take me out to lunch. Dr. Strickland is a self proclaimed "laser jock" at the University of Waterloo. She just won the Nobel Prize in Physics. She shares the award with the French physicist Gérard Mourou, and American Arthur Ashkin. Donna Strickland is only the third woman in history to win the Nobel Prize in Physics.

Donna Strickland's bright ideas lead to chirped pulse amplification. This method illuminated the way to the shortest and most intense laser pulses ever created. These laser pulses made possible such technology as Lasik eye surgery. Although not the same candle power as Dr. Strickland's cognitations, another bright idea is getting a flu shot. Why you ask? Are you dim or something? The flu (or influenza) is a highly contagious viral illness. It can spread easily from one person to another through coughing, sneezing or sharing food and drinks. You can also get the flu by touching objects contaminated with flu virus and then touching your mouth, eyes or nose. That is why hand washing is so important to prevent the spread of the flu. It is also recommended that you cough or sneeze into your elbow, sleeve or into a tissue. Influenza symptoms include fever, headache, cough, muscle aches, runny nose, sore throat and exhaustion. The symptoms of the flu are usually more severe than that of a cold. The onset of the flu is usually quite sudden. Flu symptoms usually last from 7 to 10 days, but the cough and weakness can continue for 6 weeks. Influenza arrives in Manitoba every year in late fall or early winter.

The best way to avoid getting the flu is to get the flu shot. As safe and effective as the flu shot is, people do still have questions. Questions such as "Can I get the flu from the flu shot?" No. The flu vaccine is made from dead virus parts. It cannot give you the flu. Unfortunately, some people can get sick, or can even get the flu immediately after the flu shot. That is because the flu shot doesn't start working until 2 weeks after the shot. That means you can catch the flu and get symptoms during that two week period. Also, people who seem to have gotten the flu within a day or two of the shot probably had the flu virus in them already at the time of the shot, and would have gotten sick anyway. Finally, the flu shot only protects against some very specific influenza viruses. It doesn't protect against the common cold virus or bacterial illnesses.

"Can the flu shot give me a bad reaction?" Rarely. But it is almost always safer to get the flu shot than to get the flu. The flu shot is made in chicken eggs. That means people with serious egg allergies should not get the flu shot. You can get a local reaction at the injection site that turns red and sore for up to two days. You may also get fever, headache, or muscle pain. Your pharmacist can get you acetaminophen products to help with these mild symptoms. If these symptoms get very bad or last for a long time, seek medical attention. If you get hives, difficulty breathing, or swelling of the throat, tongue or lips after you leave the flu clinic, call 911 or go to the nearest emergency department for immediate treatment.

"How well does the flu shot work?" That is difficult to say. The influenza virus mutates every year or so. Scientists look at what the flu virus was like last year and try to predict what it will be like this year when they make up a new batch of vaccine. If the virus only changed a little, the flu shot works well. If the virus changed a lot, the flu shot doesn't work as well. The on average, the flu vaccine is effective in about 50-70% of healthy adults and children. In nursing homes, the flu vaccine stops 50%-60% of flu related hospitalizations, and 85% of flu related deaths. As said before immunity to the flu usually starts about 2 weeks after the shot and lasts less than 1 year. The elderly, unfortunately, can have their immunity fall off in as little as 4 months.

Who should get the flu shot?

-Seniors aged 65 years or older

-Residents of personal care homes or long-term care facilities

-Children six months to five years of age

Those with chronic illness such as:

-an immune system weakened by disease or medical treatment

-a condition that makes it difficult to breathe

-children 6 months to 18 years of age on long term acetylsalicylic acid (i.e. aspirin) therapy.

-people with other chronic medical conditions (e.g. diabetes, mental disabilities)

-Pregnant women

-Health care workers and first responders

-Individuals of Aboriginal ancestry

-People who are severely overweight or obese

Who should not get the flu shot?

  • Infants younger than six months of age
  • Anyone who has a severe allergy to egg protein, formaldehyde or thiomerosal
  • Anyone who has a serious acute illness, with or without fever, on the day they are to be immunized. A mild illness, with or without a low fever, is not a reason to avoid getting the flu shot
  • Persons known to have developed Guillain-Barre syndrome within six weeks of a previous influenza vaccination.

Shiny happy people all over Dauphin are making their way down to the Pharmacy to get a flu shot. Do you see your future ablaze with flu shot goodness? Wikipedia has also seen the light. Donna Strickland now has a dedicated page. But I think I see another over-sight hiding in the shadows. Dr. Strickland is only an Associate Professor at the University of Waterloo. Hey University Administration! See that light at the end of the tunnel? Her name is Donna Strickland. She just won the Nobel Prize in Physics. What do you say? That's enough to make her a full Prof, right?

As always if you have any questions or concerns about these or other products, ask your pharmacist.

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The information in this article is intended as a helpful guide only. It is not intended to be used as a substitute for professional advice. If you have any questions about your medications and what is right for you see your doctor, pharmacist or other health care professional.

Manitoba Health Flu info site:

Health Canada Flu site:

Donna Strickland wins Nobel prize in Physics -


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