COVID-19 Vaccine Frequently Asked Questions

What is the COVID-19 vaccine?

A vaccine is a medicine that gets your immune system to produce antibodies. Antibodies are proteins trained to recognize the virus and protect your immune system against it. They can be produced after getting vaccinated, but also by being infected with the virus.

After getting vaccinated for COVID-19, you develop some immunity to the virus, without having to get COVID-19 first. This is what makes vaccines such powerful medicine. Unlike most medicines, which treat or cure diseases, vaccines keep you from getting sick in the first place.

How were the vaccines approved for use in Canada?

Drugs, including vaccines, are regulated under the Food and Drugs Act and regulations. They must meet the regulatory requirements for safety, efficacy and quality before they can be approved for use and distribution in Canada. Health Canada is responsible for approving vaccines.

Before approving a vaccine, they look carefully at the:

• scientific and clinical evidence — including results of clinical trials — to determine if a vaccine product is safe, effective and manufactured to the highest quality.
• safety and efficacy of the vaccine to determine that
  • there are no concerns;
  • the vaccine can trigger a strong enough immune response to protect against disease;
  • the benefits outweigh the risks.
• manufacturing process to make sure the manufacturer can carry out the necessary quality controls for the vaccine.

If there is not enough evidence to support the manufacturer’s safety, effectiveness or quality claims, Health Canada will not authorize the vaccine and the product cannot be sold in Canada.

Find out more about Health Canada’s:

• vaccine approval process
• review of COVID-19 vaccines

The vaccines were developed so quickly. How can I be sure they are safe?

Creating a new vaccine usually takes years. However, the COVID-19 vaccines were developed quickly for many reasons, including:

• being informed by decades of research on other strains of coronavirus before COVID-19 (such as Middle East Respiratory Syndrome (MERS) and Sars-CoV, also known as SARS).
• advances in science and technology.
• scientists, health professionals, researchers, industry and governments around the world all working together.
• more dollars were quickly put towards the creation of these vaccines.

Before any vaccines are available in Ontario, they:

• undergo intense clinical trials to make sure they are safe and effective.
• are evaluated and authorized for use by Health Canada, using very high standards.

Ontario makes sure vaccines remain safe by:

• transporting and storing vaccines safely and securely at required conditions and temperatures.
• finding safe clinic spaces to vaccinate people and providing the required training to those giving the vaccines.
• monitoring for any adverse reactions or side effects that may take place after vaccination, taking appropriate measures and working with the federal government, other provinces and territories.

Once a vaccine is in use, Canada has a strong vaccine safety monitoring system to tell public health authorities about changing trends or unusual reactions that were not reported before.

Read more information on vaccines and vaccine authorization updates from the Government of Canada.

What is an mRNA vaccine and how does it work?

mRNA stands for Messenger Ribonucleic Acid. mRNA vaccines, such as Pfizer and Moderna, give cells in your body instructions to make part of a harmless a protein from the COVID-19 virus.

Once the cells make the protein, the instructions are broken down. The cells display the pieces of protein they have created, then your body recognizes that protein as foreign and develops an immune response.

This response will recognize and fight the virus that causes COVID-19 if you are exposed to it later on.

mRNA vaccines do not change or affect your own DNA.

What is a viral vector-based vaccine and how does it work?

The Johnson & Johnson COVID-19 vaccine, an Ebola vaccine, and many vaccines used for animals are examples of viral vector-based vaccines.

These vaccines have a vector, which, in the COVID-19 vaccine, is a non-COVID-19 virus that has become inactive and harmless. The vector delivers "blueprints" to some of our cells, providing instructions to build a protein of the virus that causes COVID-19.

The cells build and display that protein, which our immune cells notice as being unfamiliar. Our immune cells produce an immune response and remember that unfamiliar protein so they can recognize and fight against future COVID-19 infections.

What is a protein subunit vaccine and how do they work?

Protein subunit vaccines, such as Novavax Nuvaxovid^®, contain harmless and purified pieces (proteins) of the virus, which have been specifically selected for their ability to trigger immunity.

Protein subunit vaccines are already used for other diseases. An example of an existing protein subunit vaccine is the one for hepatitis B.

Why do I need so many COVID-19 vaccines?

Individuals six months and older are considered up to date with their COVID-19 vaccines if they have received a fall 2023 COVID-19 dose. Up to date vaccines restore protection that may have decreased since your last dose and keep you protected from severe illness and/or hospitalization from COVID-19.

Why should I get vaccinated if the COVID-19 infection has a 99% survival rate?

COVID-19 can be a serious illness for many people, and for some people, symptoms can last for months. The virus can even damage the heart, brain, lungs and increase the risk of long-term health problems. Even young, healthy people can feel unwell for weeks to months following the COVID-19 infection.

The short-term side effects of the COVID-19 vaccine are less than the risk and potential long-term health damages caused by the COVID-19 virus.

Why should I get the fall 2023 dose if I've already had COVID-19 illness?

If you've already had COVID-19 illness, you should still get a fall 2023 dose for protection from reinfection or severe outcomes.

You are recommended to wait six months after symptom onset or a positive test before getting a booster dose.

Individuals at high risk of severe illness for COVID-19 and/or influenza may include:

• residents and staff of congregate living settings (e.g., chronic care facilities, retirement homes);
• pregnant individuals;
• individuals ≥ 65 years of age;
• all children six months to four years of age;
• individuals who are from a First Nation, Inuit, or Métis community, and/or who self-identify as First Nation, Inuit, or Métis, and their household members;
• individuals six months of age and older with an underlying health conditions per NACI (influenza and COVID-19);
• members of racialized and other equity deserving communities;
• health care workers and first responders.

Will the COVID-19 vaccine prevent you from getting COVID-19, or will it decrease the severity of the virus if you get infected?

What are bivalent COVID-19 vaccines? 

Bivalent COVID-19 vaccines are versions of the original COVID-19 vaccine which targets the original COVID-19 virus and the Omicron variant. Two Bivalent COVID-19 mRNA vaccines were authorized by Health Canada for use in 2022.

What is XBB.1.5 COVID-19 vaccine?

Is the XBB.1.5 COVID-19 vaccine safe?

Health Canada has one of the most rigorous scientific review systems in the world and only approves a vaccine if it is safe, works and meets the highest manufacturing and quality standards. After a thorough and independent scientific review of the evidence, Health Canada determined that the authorized XBB.1.5 vaccine is safe and effective at providing a strong immune response against COVID-19.

The benefits of getting vaccinated and being protected against COVID-19 far outweigh the risks of any side effects from the vaccine.

COVID-19 infection may cause longer-lasting symptoms and health problems for some people, which is why it is important that individuals stay up to date with their vaccinations.

Is the XBB.1.5 COVID-19 vaccine better than the bivalent vaccine?

Are children eligible to receive the XBB.1.5 COVID-19 vaccine?

Individuals aged six months and up are eligible for the XBB.1.5 COVID-19 vaccine.

For most people, including children, an interval of six months (168 days) between their last COVID-19 vaccine or infection is recommended before receiving the XBB.1.5 COVID-19 vaccine.

How long do I have to wait after my last COVID-19 vaccine to get the XBB.1.5 COVID-19 vaccine?

Who is considered high-risk for complications or hospitalizations after infection with influenza and/or COVID-19?

Individuals at high-risk for influenza and/or COVID-19 related complications or hospitalization include:

• Residents and staff of congregate living settings (e.g., chronic care facilities, retirement homes);
• Pregnant individuals;
• Individuals ≥ 65 years of age;
• All children six months to four years of age (influenza risk);
• Individuals who are from a First Nation, Inuit or Métis community, and/or who self-identify as First Nation, Inuit, or Métis, and their household members;
• Individuals six months of age and older with underlying health conditions per NACI (influenza & COVID-19);
• Members of racialized and other equity deserving communities;
• Health care workers and first responders.

Can I get the flu shot and the latest COVID-19 vaccine (XBB.1.5) at the same time?

Why should children and youth get vaccinated?

Most children with COVID-19 have mild symptoms or none at all. However, some children with COVID-19 can get very sick. Children can also spread COVID-19 to other people. Vaccinating children protects them from getting sick and reduces virus spread within their household, school and the community. Check out the COVID-19 Vaccines for Children and Youth Fact Sheet to learn more.

The vaccine is free, voluntary, safe and it works.

Do I need a parent to consent or attend my appointment with me?

Every vaccine that is given requires informed consent. Informed consent means that before receiving a vaccine, a person understands what the vaccination involves, why it is being recommended, possible side effects, and the risks and benefits if they accept or refuse the vaccine. It includes the opportunity for a safe and open discussion with a healthcare practitioner who will ultimately support their voluntary choice.

Trained and experienced nurses are available at our clinics to talk with you and your children about the vaccine and answer any questions or concerns your child may have before giving consent.

Can a parent or guardian request information about a youth’s appointment or health?

If a parent or guardian requests information about a youth’s appointment or their health, the Health Unit will require that youth’s permission to share their information with someone else.

Confidentiality is a legal obligation not to disclose information obtained in confidence without a person’s consent and applies to youth as well as adults. In most situations, a capable youth has the right to determine who will be given access to their personal health information, including parents or guardians. Sometimes, a youth may want to speak to their healthcare practitioner alone, and keep information or the decision to obtain a treatment like a vaccine, private.

What are the common side effects from the COVID-19 vaccine?

The most common side effects are mild to moderate. They include:

• pain at the injection site;
• headache;
• fatigue;
• muscle and joint pain;
• chills;
• fever.

I had side effects with one of my COVID-19 vaccines, should I get further doses to stay up to date?

Mild to moderate side effects such are relatively common and if you experience them, it is still safe to receive your next dose of COVID-19 vaccine. The most common side effects include:

• pain at the injection site;
• headache;
• fatigue;
• muscle and joint pain;
• chills;
• fever. 

Allergic or severe reactions to the COVID-19 vaccine are rare. If you experienced an allergic or severe reaction to a vaccine dose, please report it to your health care provider or our non-emergency vaccine intake line at 705-474-1400 ext. 5252. You will be provided with guidance on receiving future doses.

Are there any serious side effects?

Serious side effects are very rare. However, should you develop any of the following reactions within three days of receiving the vaccine, seek medical attention right away or call 911 if you are severely unwell:

• Hives;
• Fever over 40°C or 104°F;
• Convulsions or seizures;
• Very pale colour and serious drowsiness;
• Swelling of mouth and throat;
• Trouble breathing, hoarseness or wheezing;
• Other serious symptoms (e.g., “pins and needles” or numbness).

Rare side effects can be reported to our non-emergency vaccine intake line at 705-474-1400 ext. 5252.

If someone gets one or more of the side effects from the vaccine will they need to self-isolate and/or get tested since the side effects are on the COVID-19 symptom list?

Some of the side effects of the vaccine are similar to symptoms of COVID-19 infection. However, side effects from the vaccine should only last a day or two and go away on their own.

If you have mild symptoms within the 48 hours after vaccination, there is no need to self isolate, if symptoms:

• involve only headache, fatigue, or muscle aches/joint pain (pain, redness, and swelling at the injection site are not symptoms compatible with COVID-19).
• only began after vaccination, and there has been no exposure to someone with COVID-19 symptoms in the last ten days.

If you have the above symptoms you are encouraged to wear a mask when out in public and physically distance from others if possible.

If you have decreased or loss of smell or taste or more severe symptoms including fever and/or chills, or a new or worsening cough, then you are advised to self-isolate until your symptoms have been resolving for 24 hours (48 hours if the symptoms are gastrointestinal). It is possible that you may have COVID-19 or another infection.  

Seek medical attention, which may include a COVID test if symptoms are persisting longer than 48 hours after your vaccination, or you really aren’t feeling well and are having difficulty looking after yourself at home.

What are the long-term side effects of the vaccine?

The risk of vaccine side effects developing after a few weeks is extremely unlikely.  Vaccines do not persist in the body, they get broken down. Our experience with decades of vaccine monitoring, is that no licenced vaccine has shown to have long-term safety problems.

Manufacturers are continuing to follow clinical trial participants. They must communicate any potential safety concerns to Health Canada (Health Canada, 2020). Health professionals are required to report adverse events following immunization (AEFIs) to their local Health Unit so that these reactions can be compiled by Public Health Ontario.

Does the COVID-19 vaccine cause blood clots?

The viral vector vaccines, including the Johnson & Johnson/Janssen vaccine have been associated with rare blood clots. These are a specific type of blood clot called VITT (Vaccine-Induced Immune Thrombotic Thrombocytopenia), which does not tend to cause strokes, pulmonary embolism (PE) or deep vein thrombosis (DVT). mRNA COVID vaccines have not been associated with an increased risk of blood clots.

mRNA vaccines remain the preferred COVID-19 vaccine type for most people, given their superior efficacy and safety profile.

Does the vaccine cause myocarditis (inflammation of the heart muscle) and pericarditis (inflammation of the tissue surrounding the heart)?

Cases of myocarditis and/or pericarditis in people who received the COVID-19 vaccine are very rare. The benefits of COVID-19 vaccines continue to outweigh their potential risks, as scientific evidence shows that they reduce deaths and hospitalizations due to COVID-19. The Government of Canada encourages people to get vaccinated and to complete their vaccine series as soon as they are eligible.

Can I get COVID-19 from receiving the vaccine?

No, the vaccine does not cause COVID-19; however, it does take an average of two weeks for the vaccine to actually protect against COVID-19, so it’s possible someone could still get the virus after receiving the vaccine if they don’t follow public health measures.

When am I eligible for a COVID-19 vaccine?

Individuals six months and older are considered up to date with their COVID-19 vaccines if they have received a fall 2023 COVID-19 dose. Up to date vaccines restore protection that may have decreased since your last dose and keep you protected from severe illness and/or hospitalization from COVID-19. You are recommended to wait six months after last COVID-19 vaccine or COVID-19 illness before getting a booster dose.

You can get the vaccine at one of our upcoming vaccine clinics, or by appointment at a participating pharmacy or doctor's office.

Individuals at high risk of severe illness include:

• Residents and staff of congregate living settings (e.g., chronic care facilities, retirement homes);
• Pregnant individuals;
• Individuals ≥ 65 years of age;
• All children six months to four years of age;
• Individuals who are from a First Nation, Inuit or Métis community, and/or who self-identify as First Nation, Inuit, or Métis, and their household members;
• Individuals six months of age and older with underlying health conditions per NACI (influenza & COVID-19);
• Members of racialized and other equity deserving communities;
• Health care workers and first responders.

Which vaccine will I receive?

Who is now eligible to receive a fall 2023 dose? 

Do all my doses need to be the same brand?

No. The National Advisory Committee on Immunization has confirmed getting different brands of COVID-19 vaccine is safe and effective at protecting you and your loved ones from COVID-19 and variants.

I'm Indigenous. How can I get vaccinated?

You are welcome to receive a vaccine at any Health Unit clinic or participating pharmacy. Additional opportunities for vaccination may be available for Indigenous individuals.

To learn more about Indigenous eligibility and when and where you can be vaccinated, contact:

• For North Bay and area – the Health Unit: 1-800-563-2808
• For Mattawa and area – the Mattawa Hospital: 705-744-5511 ext. 2230
• For Parry Sound and area – the Parry Sound Friendship Centre: 705-746-5970

I’m pregnant. Should I get the vaccine?

Yes. It's recommended that all pregnant individuals, at any stage in pregnancy, get vaccinated as soon as possible. Unvaccinated pregnant individuals are at higher risk for hospitalization, ICU admission, mechanical ventilation and death compared to non-pregnant individuals. COVID-19 infections during pregnancy can be very serious, and the benefits of vaccination outweigh the risks. Learn more.

Should I get the vaccine if I'm breastfeeding?

Yes. COVID-19 vaccination is safe, effective and recommended for individuals who are breastfeeding. The mRNA from vaccines doesn’t transfer in breast milk, but vaccinated breastfeeding individuals produce antibodies which fight the virus that causes COVID-19. These antibodies do transfer in the breast milk and provide protection to the infant. Read more.

Is the vaccine mandatory?

Some places, such as hospitals, home and community service providers and non-essential services may require employees, contactors, students and volunteers to be up to date with COVID-19 vaccinations. 

What does it mean to be up to date with my COVID-19 vaccinations?

Individuals six months and older are considered up to date with their COVID-19 vaccines if they have received a fall 2023 COVID-19 dose. Up to date vaccines restore protection that may have decreased since your last dose and keep you protected from severe illness and/or hospitalization from COVID-19. You are recommended to wait six months after your last COVID-19 vaccine or COVID-19 illness before getting your next dose.

How long does it take after I'm vaccinated to be protected against COVID-19?

Studies have shown that the vaccine starts to take effect approximately 14 days after the first dose, and provides even more protection seven to 14 days after the second dose. 

If I tested positive for COVID-19 in the past, should I still get the vaccine?

Yes. You will have some immunity from your infection, but it is not known how long it will last. There are cases where people have gotten COVID-19 again before they could get vaccinated.

You should not get the vaccine if you're sick or have COVID-19 right now. Wait until you're better to get the vaccine.

It is recommended you receive your booster dose six months after symptom onset (or positive test result if you've remained symptom-free). Evidence shows that a longer time between COVID-19 infection and vaccination is associated with improved antibody responses to COVID-19 vaccines.

I just got vaccinated for something else. Can I still get the COVID-19 vaccine now?

Yes. The COVID-19 vaccine can be received at the same time as, or at any time before or after non-COVID-19 vaccines. There are two exceptions. COVID-19 vaccines should not be co-administered with the mpox vaccine or adult RSV vaccines.

If I had a reaction to a different vaccine in the past, can I still get the COVID-19 vaccine?

If you had an allergic reaction within four hours and/or anaphylaxis that happened with a vaccine or injectable medication that does not contain a component or cross-reacting component of the COVID-19 vaccines, you can receive the COVID-19 vaccine as long as you are observed for at least 30 minutes immediately afterwards.

If you're unsure, check with your doctor or health care provider. They will look at your medical records and help you make the decision.

Is it acceptable for someone with food or seasonal allergies to receive the COVID-19 vaccine?

Yes. People with a history of significant allergic reactions and/or anaphylaxis to any food, drug, venom, latex or other allergens not related to the COVID-19 vaccine can get the COVID-19 vaccine followed by observation for at least 15 minutes.

Anyone with allergy issues like allergic rhinitis, asthma and eczema can also receive the vaccine followed by observation for a minimum of 15 minutes.

I had an allergic reaction to a previous dose of the COVID-19 vaccine. Should I get my next dose?

If you had anaphylaxis or a severe or immediate (within one hour) allergic reaction to a previous dose of a COVID-19 vaccine or to any of its components, you should not receive the COVID-19 vaccine in a general vaccine clinic. A referral to an allergist/immunologist is recommended to assess the method for possible (re)administration of a COVID-19 vaccine.

If you had a non-severe allergic reaction which occurred more than one hour after receiving a previous dose of a COVID-19 vaccine or any of its components, an evaluation by an allergist/immunologist may be recommended to confirm you can safely receive the vaccine. 

For individuals with non-severe and delayed reactions to their previous vaccine, vaccination can usually proceed with an extended observation period of at least 30 minutes. 

All Health Unit clinics are staffed with individuals trained to assess and respond appropriately to allergic reactions including anaphylaxis.

Documentation of the consultation with the allergist/immunologist must be provided to the clinic and include:

• a vaccination care plan;
• details/severity of the previous allergic episode(s);
• confirmation that appropriate counselling on the safe administration of vaccine was provided;
• date, the clinician’s name, signature and contact information;
• your name and date of birth.

Can I book an appointment for my family member or friend?

Yes, you can book a COVID-19 vaccination appointment for yourself, a family member, friend or someone whose medical care and appointments you manage, as long as you have consent to do so. You may also walk in with them to a COVID-19 vaccine clinic and accompany them throughout the process.

How can I book an appointment?

Appointments for COVID-19 vaccinations can be booked online or by phone. Individuals will not be able to book an appointment in-person at Health Unit office locations, or if they do not pass the screening for eligibility.

To book an appointment online, have your health card ready, and go to www.Ontario.ca/BookVaccine. From there, you will be able to register for an appointment. Once you have filled out all the fields, remember to click "confirm" to save your appointment.

If you're unable to book online, you may book your appointment over the phone by calling the Provincial Booking Line at 1-833-943-3900.

You may also walk in to one of our upcoming clinics without booking an appointment. If possible, please bring your health card or other form of ID. 

Will the system accept an expired health card?

What do I do if I receive a "Health Card is invalid" message when booking online?

Can I schedule two people at the same location and time when booking online?

Booking appointments can only be done one at a time. However, there are many time slots available at each clinic, often making booking appointments close together possible. You can also walk in to one of our clinics as a pair and receive the vaccine together.

How do I change, cancel or rebook an appointment?

If you scheduled an appointment through the provincial online booking system, you can reschedule or cancel:

• online – go to the confirmation email you got when you booked and follow the instructions
• by phone - call the Provincial Vaccine Booking Line at 1-833-943-3900 (TTY 1-866-797-0007)

You will need your:

• health card (information on front and back)
• postal code

What if I forget or lose my appointment information?

If you scheduled a vaccination through the provincial online vaccine booking system and forget when or where your appointment is, call the Provincial Vaccine Booking Line at 1-833-943-3900 (TTY 1-866-797-0007). This line is available 8:30 a.m. to 5 p.m., Monday to Friday (excluding holidays).

You will need your:

• health card (information on the front and back)
• postal code