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COVID-19 Vaccines 1. Pfizer- The Pfizer-BioNTech vaccine is one of several vaccines that can protect against COVID-19. Research indicates that the vaccine has high efficacy in people aged 16 and over. The pfizer vaccine is a shot that may protect people from developing Covid-19. Its brand name is Comirnaty. Pfizer Inc., one of the world's largest biopharmaceutical companies, and BioNTech, a German biotechnology company, created this vaccine. The vaccine works by introducing a molecule to cells, known as messenger RNA (mRNA.) This molecule teaches cells to make a protein from the virus that causes COVID-19, which is SARS-CoV-2. The body detects this protein and triggers an immune response. This creates antibodies, as well as longer lasting immunity that can fight off future SARS-CoV-2 infections. Pfizer does not contain allergens, such as eggs, latex, or preservatives. .                                                           2. AstraZeneca- The AstraZeneca COVID-19 vaccine, now called Vaxzevria, is a viral vector vaccine, just like the Johnson & Johnson vaccines. It uses a chimpanzee adenovirus to carry spike proteins from the coronavirus into your body to create an immune response. Despite initial pauses about its safety regarding blood clots, the AstraZeneca vaccine has been deemed safe by the European Medicines Agency (EMA) and is still recommended bt the World Health Organization.