4 doctors weighed in:

What's the difference between the first MMR vaccine, and the second dose?

4 doctors weighed in
Dr. Charlene Sojico
Pediatrics
2 doctors agree

In brief: No difference

It is the same vaccine given at 12 months old.
A second dose is required to boost your immunity (higher protection rate) to these very contagious diseases with bad outcome when contracted.

In brief: No difference

It is the same vaccine given at 12 months old.
A second dose is required to boost your immunity (higher protection rate) to these very contagious diseases with bad outcome when contracted.
Dr. Charlene Sojico
Dr. Charlene Sojico
Thank
Dr. Larry Lutwick
Internal Medicine - Infectious Disease
2 doctors agree

In brief: Nothing

The second dose contains the same attenuated viruses as the 1st.
It became recommended when it was found that the 'failure' rate with one shot was as high as 5% with measles protection.

In brief: Nothing

The second dose contains the same attenuated viruses as the 1st.
It became recommended when it was found that the 'failure' rate with one shot was as high as 5% with measles protection.
Dr. Larry Lutwick
Dr. Larry Lutwick
Thank
Get help from a real doctor now
Dr. Cindy Juster
Board Certified, Pediatrics
34 years in practice
2M people helped
Continue
111,000 doctors available