No. In response to the COVID-19 pandemic, companies like Pfizer, Moderna, AstraZeneca, and Johnson & Johnson have all been trying to develop their own COVID-19 vaccine using different research and techniques. At the moment, the Pfizer, Moderna, AstraZeneca, and Janssen (Johnson & Johnson) vaccines have been approved by Health Canada.The Pfizer and Moderna vaccines are somewhat similar as they both use a technology called messenger RNA, or mRNA. These vaccines don’t contain a weakened version of COVID-19. Instead, they contain material that teaches our cells how to make a protein, which will trigger an immune response. Once triggered, your body then creates antibodies that can help you fight an infection from the real virus. Studies showed that the Pfizer vaccine is 95% effective and the Moderna vaccine is 94.1% effective in preventing COVID-19.The AstraZeneca and Janssen (Johnson & Johnson) vaccines are the same type of vaccine. They are viral vector-based vaccines, using SARS-Cov-2 spike proteins to trigger an immune response. The recombinant viral vector used is the adenovirus, the same virus that causes the common cold. The viral vector in the vaccine produces the SARS-CoV-2 spike protein – a protein that’s also found on the COVID-19 virus. This method allows your body to build an immune response to the spike protein, without exposure to the COVID-19 virus.The main difference between them is that the AstraZeneca vaccine requires two doses while the Janssen vaccine only requires one. The AstraZeneca and Janssen vaccines have similar efficacy rates – around 62% for AstraZeneca and 66% for Janssen.