What could go wrong? 
"...according to a paper published in Nature on June 22, COVID-19 mRNA vaccines, by mode and action, are gene therapy products and should adhere to different regulatory standards. Yet U.S. and European regulatory agencies have not classified COVID-19 mRNA vaccines as gene therapy products, which has allowed them to be regulated as vaccines against infectious diseases instead of being subjected to the more stringent regulation of GTPs."
"According to the paper, because mRNA COVID-19 vaccines were not classified as gene therapy, necessary tests required for GTPs were not performed for the following:
Genotoxicity.
Genome integration.
Germ-line transmission.
Insertional mutagenesis.
Tumorigenicity.
Embryo/fetal and perinatal toxicity.
Long-term expression.
Repeated toxicity.
Excretion in the environment, such as shedding through seminal fluid or breast milk."
“The long-term safety monitoring of GTPs is required over several years whereas, for vaccines, it is generally only carried out over a few weeks,” wrote Dr. Helene Banoun with the French Institute of Health and Medical Research in the paper. “This should not be acceptable, given the persistence of the drug product and the expressed protein.”
https://www.mdpi.com/1422-0067/24/13/10514https://www.zerohedge.com/covid-19/new-research-paper-mrna-covid-19-vaccines-are-gene-therapy-products