There are several reasons that may result in your vaccination records being invalid. These may include but are not limited to the following: 

• The vaccine was given before the age of 1 
  
• The vaccine was given too early (did not follow the recommended timing between the vaccine doses as per the BCCDC guidelines) 
  
• The vaccine record submitted did not have a date recorded (day/month/year) 
  
• The vaccine received is not recognized in Canada 
  

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A titre is a blood test that may have been recommended by your health care provider to determine whether or not you have immunity for a specific disease. ‎

Immunity refers to the body's ability to keep from getting a disease; protection from a disease, ability to fight off an illness 

Interpreting Titre Results:

• Reactive: this means that you have immunity against the disease
• Non-Reactive: this means that you do not have immunity against the disease and further vaccinations are recommended. If your titre was done after being vaccinated, please discuss with your health care provider or the person that will be immunizing you.  
• Equivocal: this means that you do not have enough immunity against the disease and further vaccinations are recommended. If your titre was done after being vaccinated, please discuss with your health care provider or the person that will be immunizing you.
• Non-Reactive and Non-Responder: this means you do not have immunity against the disease after completing two full series of Hepatitis B vaccines; and further vaccinations are not recommended. Please discuss with your health care provider as additional testing and guidance may be recommended. 
  

There are several reasons that may result in your titre records being invalid. These may include but are not limited to the following: 

• The titre record submitted did not have a date recorded (day/month/year) 
  
• Titres for the specific disease may not be acceptable as proof of immunity as per BCCDC guidelines (as such vaccinations are recommended) ‎
  

If a titre (blood test) is recommended for you according to the BCCDC guidelines for health care workers, instructions will be provided to you by one of the following: your health care provider, the individual who is immunizing you, or by the Provincial Workplace Health Contact Centre.‎‎‎

Below is some information to help you determine when your next vaccine dose is recommended.

Information contained in the below table has been obtained from the BC Centre for Disease Control (BCCDC) Immunization Manual, specifically Part 1: Immunization Schedules and Part 4: Biological Products (Vaccines & Immune Globulins).