2 doctors weighed in:

For what reasons do we need 3 does of certain vaccinations like hepatitis b?

2 doctors weighed in
Dr. James Ferguson
Pediatrics
1 doctor agrees

In brief: Building immunity

Vaccine developers will routinely check the effect of single vs several dose programs to see what is needed to provide long term protection.
If one dose works but fades after months & 3 will give you many years of protection, the 3 dose program will be the one adopted.

In brief: Building immunity

Vaccine developers will routinely check the effect of single vs several dose programs to see what is needed to provide long term protection.
If one dose works but fades after months & 3 will give you many years of protection, the 3 dose program will be the one adopted.
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