Quote:
Originally Posted by golfing eagles
Two factors are at play:
1) In general, the more time that passes after a vaccine, the less effective it becomes.
2) The older we get, the less efficient our immune system becomes.
Pertussis vaccine is known to lose its effectiveness over time---this why the current recommendation is for grandparents that want to hold a newborn to get re-vaccinated with pertussis vaccine
|
I always appreciate your knowledge and insight. Thanks!