Hi all, this information from the CDC and Mayo Clinic might help answer some of your questions about the mRNA vaccine.

- Understanding mRNA COVID-19 Vaccines https://www.cdc.gov/coronavirus/2019-ncov/vaccines/different-vaccines/mrna.html
"mRNA vaccines do not use the live virus that causes COVID-19. They do not affect or interact with our DNA in any way. mRNA never enters the nucleus of the cell, which is where our DNA (genetic material) is kept. The cell breaks down and gets rid of the mRNA soon after it is finished using the instructions."

How messenger RNA vaccines work https://connect.mayoclinic.org/page/podcasts/newsfeed-post/how-messenger-rna-vaccines-work/
On the Mayo Clinic Q&A podcast, Dr. Gregory Poland, an infectious diseases expert and head of Mayo Clinic's Vaccine Research Group, explains how mRNA vaccines work, gives a status update on the pandemic and answers listener questions.