ok lets clear up the inaccuracies

1. the pfizer vaccine is not taking the rna of the neucleus(central part that tells a cell what to replicate)
2. the pfizer vaccine is taking rna from the spikey shell that 'knocks on door' of a cell asking to be let in
3. the 90% is not 90% of all 22k vaccine participants

the 90% is based on this
44k total participants .. 22k had the vaccine 22k had a placeblo
out of all 44k so fat only ~95 people then got covid. where ~85 were in the placebo group and 9 were in the vaccine group

so the ASSUMPTION is that the 2 groups should have had same risk of getting covid. and by a placebo group having 85 cases and vaccine group only having 9. they judge it as a v9:85p thus 90% effectivity

but these numbers are based on only 100 of the 44k being exposed to covid. meaning its too early to actually know