Question to you! Did you ever take any mRNA C0VID-19 injections yet? I know isn't vaccine to prevent coronavirus infection?
Of course the earth is neither flat nor oblong. I flew as 747 cockpit rider around U.S. and over Pacific Ocean to around Asia!
Yes. I and some of my colleagues had the Moderna mRNA vaccine back in January/Februrary. I had a sore arm for a couple of days. That was about it. One of my colleagues was very fatigued for about a day after. Nobody else seemed to have any significant effects.
"I know isn't vaccine to prevent coronavirus infection?"
Is English not your first language? I'm having some difficulty parsing this sentence. You seem to be asking something about whether the vaccine prevents COVID-19. It does. It's about 94.1% effective, which is among the most effective vaccines ever developed. The smallpox vaccine is about 95% effective. The whooping cough vaccine is around 80% effective. The measles vaccine is about 97% effective.
In real world data gathered from Israel, the Pfizer mRNA vaccine was found to prevent 94% of asymptomatic COVID-19 infections and 97% of symptomatic COVID-19 infections. Both are quite safe and both are quite effective.