What about allergy to penicillin? Do you know about contraindications with this allergy? Is it safe to blast the RNA - and is it blasted for good? Forgive me, I understand very little about this. Is it possible these new strains won't be covered by these vaccines? I heard an official say if that is the case they will be modified to cover the new strains. I applaud for this article and recalling ejoying a previous article by you.