Do we have any mRNA based vaccines on the market currently?
Yes we do, for VEEV: https://www.mdpi.com/2076-393X/8/2/273/htm
Further, we have two vaccines just out of testing about to enter the market. That would be the Pfizer and Moderna COVID-19 vaccines. Both have completed all the normal Phase 1, Phase 2, and Phase 3 clinical trials. Both have been proven safe and effective with over 100,000 closely monitored volunteers between the US and the UK.