![]() The virus' genetic code is delivered to the leaf cells of the plant using harmless bacteria. This type of vaccine uses plant-based technology. Learn more about protein subunit vaccines Plant-based vaccines They can't cause COVID-19 because they only contain small purified pieces of proteins and not the virus itself. Protein subunit vaccines are already used to protect against other diseases, such as hepatitis B. ![]() Once vaccinated, your immune system triggers an immune response that will help protect you against COVID-19. Protein subunit vaccines contain harmless and purified pieces (proteins) of the virus, which have been specifically selected for their ability to trigger immunity. Learn more about viral vector vaccines Protein subunit vaccines The adenovirus isn't the virus that causes COVID-19. ![]() The protein will trigger an immune response that will help protect you against COVID-19. This delivery system helps your cells to make a coronavirus protein. This type of vaccine uses a harmless virus (in this case, an adenovirus) as a delivery system. Learn more about mRNA vaccines Viral vector vaccines You can't get COVID-19 from the vaccine and it doesn't interact with your DNA or change it in any way. MRNA vaccines don't use a live virus to trigger an immune response. These antibodies help you fight the infection if the real virus does enter your body in the future. Once triggered, your body makes antibodies. This protein will trigger an immune response that will help protect you against COVID-19. This type of vaccine helps your cells make a coronavirus protein. Learn more about vaccine safety in Canada mRNA vaccines The vaccines can't give you COVID-19 because they don't contain the virus that causes it. The benefits of all COVID-19 vaccines continue to outweigh the risks of the disease. COVID-19 vaccines are tested during their development according to international standards and then carefully reviewed by Health Canada. Only vaccines that meet the safety, effectiveness and quality standards of Health Canada are approved for use in Canada.
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