There is not a single procedure performed in medical field which is 100% safe. Not even elective plastic surgery is 100% safe. Patients have died during simple out-patient procdures. I was with smallpox vaccine in 1947. The sight of innoculation became horribly infected and created 2 huge scabs on my arms. That was not a pleasant side effect of the vaccine. 2 years later I got infected with smallpox. Luckily, the vaccine had stocked by 9 year body with enough anti-bodies and I survived the 30%+ mortality rate smallpox. But I still have marks on my face left behind by the small pox 73 years later.
Wow, what a story. You must have inherited some good genes to survive all of that.