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Middlesex-London Health Unit

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COVID-19 Vaccine

The COVID-19 vaccine is your best defense against getting severely ill from the COVID-19 virus. When you're eligible, get vaccinated! Learn more →

NOTICE: The XBB COVID-19 vaccine is not yet available in London and Middlesex County, including the Health Unit’s Western Fair Vaccination Clinic. When Ontario’s Fall 2023 COVID-19 vaccine eligibility information becomes available, the Health Unit will share these details widely with our community. Thank you for your patience and understanding.


COVID-19 Vaccination Clinics
There are limited places to receive the COVID-19 vaccine in London and Middlesex County. Find the list of dates, times and locations →

Pfizer and Moderna Available
The Pfizer and Moderna COVID-19 vaccines are available at COVID-19 vaccination clinics run by the Middlesex-London health unit.

Proof of COVID-19 Vaccination

Proof of vaccination is no longer required in all settings across Ontario. Businesses and other settings may choose to continue to require proof of vaccination. Learn more →

How to access your Ontario vaccine receipt

To access your enhanced vaccine certificate with QR code, please visit: NOTE: you will need your date of birth, postal code and health card information in order to access your enhanced vaccine certificate with QR code. 

If you don't have a green Ontario Health Card or used another form of identification (e.g. Driver’s License) at the time of vaccination, or if you have questions or concerns about your vaccine receipt, please call 519-663-5317 (8:30 a.m. to 4:30 p.m., Monday to Friday).

Alternatively, to have a enhanced vaccine certificate with QR code emailed or mailed to you, call the Provincial Vaccine Contact Centre at 1-833-943-3900.

Verify Ontario App

Businesses and organizations can now download the verification app, called Verify Ontario, to verify enhanced vaccine certificate with QR code. Available for iOS and Android devices. Learn more →


Pregnancy, Breastfeeding, and the COVID-19 Vaccine

Are you pregnant, planning on getting pregnant, or breastfeeding? It is important that you receive the COVID-19 vaccine. For individuals who are pregnant, it is recommended that you be vaccinated as soon as possible, at any stage of your pregnancy. The COVID-19 vaccine is safe and effective, even while pregnant or breastfeeding. There is also no evidence that the COVID-19 vaccine affects fertility in any way.

For more information, check out the Provincial Council for Maternal and Child Health's Vaccination in Pregnancy & Breastfeeding Patient Decision-Making Tool or speak with your primary health care provider.



COVID-19 Vaccine: Pregnancy, Breastfeeding & Reproductive Health Q&A Video

Watch the recorded video on Instagram

Vaccination in Pregnancy & Breastfeeding Decision-Making Tool

Download the Decision-Making Tool

About the COVID-19 vaccines

Which vaccines have been approved? Health Canada has approved the following COVID-19 vaccines:

Novavax Nuvaxovid COVID-19 Vaccine

The vaccine is intended for individuals who are allergic or had a previous reaction to an mRNA vaccine, who aren’t able to receive an mRNA vaccine due to medical reasons, or who do not want to receive an mRNA vaccine.  This vaccine can be used as a primary series for individuals 12 years of age and older, and as a booster dose for those 18 years of age and older. 

If you are interested in receiving the vaccine, please call 226-289-3560 to be added to the list. This vaccine is administered at specific clinics only, and appointments are required.

National Advisory Committee on Immunization (NACI) 

The National Advisory Committee on Immunization (NACI) occasionally releases statements on COVID-19 vaccines. To read the most recent statements, visit: National Advisory Committee on Immunization (NACI): Statements and publications and expand "COVID-19" from the list of vaccines.

How do the COVID-19 vaccines work?

mRNA Vaccine

Both the Pfizer-BioNTech Comirnaty and the Moderna Spikevax COVID-19 vaccines are mRNA vaccines. This means they use mRNA to teach the body’s cells how to make a protein which will cause your body to have an immune response and make antibodies. These antibodies then help fight an infection if the virus, which causes COVID-19, later enters the body. These vaccines do not use a live virus – they cannot give you COVID-19. Learn more →

Protein Subunit Vaccines
The Novavax Nuvaxovid COVID-19 vaccine is a protein-based vaccine. This means it uses purified pieces of the virus (proteins) which are harmless and have been included in the vaccine specifically because they trigger an immune response. In this case, the “spike” protein is used. As they do not contain the virus, this vaccine cannot cause COVID-19. Protein subunit vaccines are already used for other diseases.

Are the COVID-19 vaccines effective?

All vaccines approved by Health Canada for use in Ontario are determined to be safe and effective through an independent, scientific, and thorough review of the research. For more information, please review the resources below.

Are the COVID-19 vaccines safe?

The COVID-19 vaccines are safe and effective

All vaccines approved by Health Canada for use in Ontario are determined to be safe and effective through an independent, scientific, and thorough review of the research.

As with most vaccines, common side effects have been reported during their research trials. These side effects are likely to be moderate and resolve after a few days. Learn more →

Important information: Adverse Reactions

In very rare situations, some people may experience serious symptoms or an adverse reaction. Learn more about the symptoms at

When should I see a health care provider?
There have been a small number of reports of myocarditis and pericarditis (inflammation in different parts of the heart) following immunization with an mRNA vaccine. Most cases developed within one week of vaccination, have been mild and resolved quickly. Seek medical attention right away if you develop any of the following symptoms after vaccination:

  • Chest pain / feeling of pressure or tightness in your chest
  • Shortness of breath
  • Heart palpitations / irregular heartbeat

If you experience myocarditis or pericarditis after your first dose of an mRNA vaccine, speak with your health care provider or local public health unit for the most up-to-date recommendations about receiving any subsequent doses of COVID-19 vaccine.

Who should not get the COVID-19 vaccine?

You should not get the vaccine if you:

  • are younger than the approved age for the vaccine
  • are not currently eligible for a dose

You should delay getting the vaccine if you:

  • have symptoms of an acute or co-existing illness
  • have symptoms of COVID-19
  • have been advised to self-isolate due to a suspected or confirmed COVID-19 infection or close contact with someone who has COVID-19 – delay until your period of self-isolation is over

For more information, please visit COVID-19 vaccines.

There are certain situations when you will need to talk to your primary healthcare provider before receiving the vaccine. These include if you:

  • have ever had a severe allergic reaction (e.g. anaphylaxis) to a previous dose of the COVID-19 vaccine or any of its components or container
  • have a history of anaphylaxis or immediate allergic reaction to any other vaccine or injectable therapy (you must provide documentation at the COVID-19 vaccination clinic from an allergist-immunologist that it would be okay to immunize you in a non-hospital setting)
  • are receiving immunosuppressing therapies such as stem cell therapy, chemotherapy, CAR-T therapy, immune checkpoint inhibitors, monoclonal antibodies (eg. Rituximab) and other targeted agents (such as CD4/6 inhibitors, PARP inhibitors etc). You must speak with your treating provider to ensure the timing of vaccine doses and therapies, and you must state that you have spoken to them prior to receiving the COVID-19 vaccine)

Remember to speak to the vaccinator (the person who will provide the vaccine to you) at the COVID-19 Immunization Clinic if you have discussed any of the issues mentioned above with your primary healthcare provider, or if you:

  • have had any problems following a previous vaccine
  • have any allergies
  • have a high fever or severe infection
  • have any serious illness
  • have an autoimmune condition
  • have a weakened immune system due to a medical condition or are taking medication that affects your immune system
  • have a bleeding disorder or are taking medication that could affect your blood clotting, if you bruise easily or are taking a blood-thinning medication

More Information

Date of creation: December 18, 2020
Last modified on: September 27, 2023


3BioNTech Manufacturing GmbH & Pfizer Canada ULC. (2020; revised 2021, November 19). COMIRNATY: COVID-19 mRNA vaccine, suspension for intramuscular injection [Product monograph]. Retrieved from
4National Advisory Committee on Immunization. (2020, December 12). Recommendations on the use of COVID-19 vaccine(s). Retrieved from
5Moderna Therapeutics Inc. (2020, December; revised 2021, November 12). SPIKEVAX™: Elasomeran mRNA vaccine Dispersion for intramuscular injection Multidose Vial, 100 mcg / 0.5mL Active Immunizing Agent [Product monograph]. Retrieved from
6National Advisory Committee on Immunization. (2021). Recommendations on the use of COVID-19 vaccines. Government of Canada. Retrieved from
7Government of Canada. (2021). Details for: VAXZEVRIA - COVID-19. Retrieved from
8Government of Canada. (2021). Details for: Janssen COVID-19 vaccine. Retrieved from
9National Advisory Committee on Immunization. (2021, April 23). Summary of updated vaccine statement of April 23, 2021. Government of Canada. Retrieved from
10National Advisory Committee on Immunization. (2021, May 3). Recommendations on the use of COVID-19 vaccines. Government of Canada. Retrieved from
11Novavax, Inc. (2022, February 17). NUVAXOVID ™ COVID-19 Vaccine (Recombinant protein, Adjuvanted) Suspension for intramuscular injection Multidose Vial, 5 mcg / 0.5 mL (per dose) (contains 10 doses of 0.5 mL) Active Immunizing Agent [Product Monograph].. Retrieved from
12Government of Canada. (2022). Details for: COVIFENZ - COVID-19 Retrieved from