Both the Pfizer and Moderna vaccines use messenger RNA (mRNA) to encourage your cells to initiate an immune response to COVID-19. Our body relies on proteins every day to keep us healthy. Our body uses mRNA to tell our cells which proteins to make - antibodies in this case. Vaccines that use mRNA are typically quicker and easier to produce, which has helped accelerate the COVID-19 vaccine development process.
The ingredients used in the mRNA vaccines are simple. They contain mRNA, as well as lipids to ensure safe delivery of the mRNA to initiate an immune response. Although the Food and Drug Administration (FDA) approved adjuvants (aluminum salts) and preservatives (ethlymercury) have a history of safe use in vaccines, they were not used by Pfizer or Moderna in this vaccine technology.
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