Fwiw, i think people downvoting you is unfair. I may disagree with your risk assesment, but i asked the question and you gave your answer, so it seems unfair for people to downvote you when you appear to have answered in good faith.

That said though - i'd point out that https://clinicaltrials.gov/ct2/show/NCT04470427 isn't solely a safety study. They are also checking things like how long the immunity lasts.