I won't go on, but by definition, a medicine that you take that's intended to build up your immune response to a disease is a vaccine. I saw someone upstream write "Intramuscular/serum vaccines cannot stop respiratory infections, by definition," and as far as I can tell this is just point-blank wrong. Whooping Cough -- pertussis -- is a respiratory bacterial infection we've been vaccinating against with intramuscular shots since the 1940s.
https://www.cdc.gov/flu/prevent/flushot.htm
So does the Mayo Clinic:
https://www.cdc.gov/flu/prevent/flushot.htm
I won't go on, but by definition, a medicine that you take that's intended to build up your immune response to a disease is a vaccine. I saw someone upstream write "Intramuscular/serum vaccines cannot stop respiratory infections, by definition," and as far as I can tell this is just point-blank wrong. Whooping Cough -- pertussis -- is a respiratory bacterial infection we've been vaccinating against with intramuscular shots since the 1940s.