Every vaccine does one job. It shows your immune system an antigen so memory can form. What differs is what is actually in the vial. Open each of the seven types below, follow it into the body, and then run a host check. That last step is where the live ones part company from the rest.
Live attenuatedwhat is in the vial
Grows in the host
yes
Can cause the illness
risk
Response strength
95
Boosters
rarely
Host check, all seven typesa healthy adult
The one rule to carry. Only live vaccines contain something that can grow. That is the whole reason they are the ones held back.