$WHACKD

This article https://science.news/2020-05-25-mrna-vaccines-how-they-work-coronavirus.html published in May 2020 lists the five main risks associated with mRNA vaccines as

• 1 Sudden onset of autoimmune disorders
• 2 Heightened inflammation in the body
• 3 A heightened risk of blood clotting
• 4 Immune response interference
• 5 Inability to stop runaway out of control self replication

These risks in addition to many other unknowns are discussed in the article.