Because autoimmune reactions to antigens either show up in 3 months or they don't.
Vaccines are tiny and you don't take them chronicially. They aren't like medicine.
The bad side effects are entirely your body attacking itself.
And there's a well-studied branch of medicine dealing with that. There's no autoimmune disease which emerges only >2 years after exposure to an antigen. In all of medicine that phenominon doesn't exist in order for to happen after an mRNA vaccine.
Vaccines are tiny and you don't take them chronicially. They aren't like medicine.
The bad side effects are entirely your body attacking itself.
And there's a well-studied branch of medicine dealing with that. There's no autoimmune disease which emerges only >2 years after exposure to an antigen. In all of medicine that phenominon doesn't exist in order for to happen after an mRNA vaccine.