evidence: Traditional vaccines put a weakened or inactivated germ into our bodies. Messenger RNA (mRNA) vaccines, like the Pfizer and Moderna COVID-19 vaccines, teach cells how to make a protein that triggers an immune response if someone gets infected. When the vaccine is injected into the upper arm, the mRNA enters cells near the site of the injection and tells the cells to start making the same protein that is found in the COVID-19 virus. The immune system recognizes this protein and begins producing antibodies that can fight the virus if the vaccinated person is later infected. None of the vaccines interact with or alter your DNA in any way, and therefore cannot cause cancer. MRNA is not the same as DNA and cannot be combined with DNA to change your genetic code. The mRNA is fragile and it delivers the instructions to your cells to make antibodies against SARS-CoV-2. The mRNA does not enter the nucleus of the cell — the part that contains your DNA. Therefore, there is no truth to the myth that somehow the mRNA vaccine could inactivate the genes that suppress tumors. [...] RNA breaks down easily and quickly unless it is kept at low temperatures. In the body, this isn’t a problem because RNA does not need to exist long in order to carry out its function. But vaccines may need to be kept stable for days or even weeks before they are administered. This has not been nearly as much of a concern with conventional vaccines. Weakened or inactive versions of a virus can remain stable longer without requiring low temperatures.