Because they are hard to score a vaccine hit on everyone. A dTAp vaccine is often indicated in causing ear, nose and thorat problems, among other things.
From Samantha Martenson
Went to an ENT (ear nose throat) doctor today for my ringing ears,and while I was waiting in the office,they gave me an iPad with 'important information'.
Wow. This is sick! ~Samantha Martenson in Stop Mandatory Vaccination
Another group of vaccine pushing soulless sellouts