The only full-service urgent care with access to medical specialists in orthopedics, ophthalmology, otolaryngology and other specialties.

The only full-service urgent care with access to medical specialists in orthopedics, ophthalmology, otolaryngology and other specialties.

Our Tucson clinic will be closed this afternoon - Friday Oct 22, 2021

Not all Flu Shots are the same

To many people’s surprise not all flu vaccines are alike and have a huge variance on how they are created and what they treat. Right now in mainstream America there are about 8 flu shots to choose from.

We have done our research and selected the new FLUCELVAX QUADRIVALENT FLU SHOT to administer this year. Let me explain why.

As the prefix (“quad”) in the name indicates, it offers the widest protection against the flu by covering the 4 most common viruses. It is a cell-based flu shot. It is prepared from inactivated (dead) flu viruses from a cell culture (not the traditional egg based medium). This is important because the egg can create “egg-adapted changes” that can possibly alter the effectiveness of the flu shot and result in additional side effects. The end-result of the Flucelvax Quadrivalent Flu Shot is an antibiotic free, preservative free, and latex free Vaccine that can be administered to patients 4 years and older and can be gentler on the body.

The Flu is serious business and is here already. According to the Centers for Disease Control, peak flu season in the United States can occur anytime between November and March.

It is important to make an informed decision as your health depends on it. To learn more about flu shots, I have prepared this summary to share with you:

There are two categories of flu vaccines: Trivalent (three viruses) and Quadrivalent (four viruses).  The trivalent shot covers 2 influenza A viruses (H1N1 and H3N2) and only 1 influenza B virus.  Whereas the quadrivalent covers the same two influenza A viruses PLUS the 2 main influenza B viruses.

To complicate matters further, there are different ways the trivalent and quadrivalent vaccines are created and prepared.  This results in different indications for use.  Some are indicated for ages 4 and up, others are indicated only for 18-64-year old’s, 65 and older or 18 and older.

Typically, providers will have 1,2 or sometimes 3 variations of the flu shot available, which usually looks like this:


  • Usually the cheapest
  • Most common and generic “flu shot”

Trivalent “Boost or “High-Dose” for 65+

  • Higher dose of antigen to help elderly people with better immune response.


  • Costs more than Trivalent
  • Offers potentially more flu coverage
  • Depending on how it is created it can be harder or easier on the body

Lastly the flu vaccine is now created in several different ways. Egg-Based, Cell-Based and Recombinant Flu Vaccines. These are the processes that actually create the sample of the virus. 

This makes choosing the new FLUCELVAX QUADRIVALENT FLU SHOT, available at Urgent Specialists, the right choice.

Urgent Care by Urgent Specialist is here for you this flu season!

Urgent Specialists is the most modern and comprehensive Urgent Care facility in the city of Tucson. We have done our research and are prepared for flu season. I hope you visit our first class Urgent Care next to the foothills mall to get your flu shot.


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