CDC tells us about the mRNA in COVID-19 vaccines

Notice in this CDC post that it says “will be” rigorously evaluated for safety. Two months later at the time this is posted, after many have been injected with it, evaluation is still in the future.

Source:

• 
  March 4, 2021. Centers for Disease Control and Prevention. “Understanding MRNA COVID-19 Vaccines.”
  https://www.cdc.gov/coronavirus/2019-ncov/vaccines/different-vaccines/mrna.html.
  Centers for Disease Control and Prevention.

See also, on this site:

• The CDC modifies its assurances about mRNA “vaccines”