Thank you for your question.
I am Dr. Su S. and I will try my best to help you.
When a live vaccine is given, body develops immunity.
To have an optimum immunity, it can need 3-4 weeks.
During this time, if another live vaccine is administered there can be interference with development of immunity.
So at least 4 weeks interval is advised.
2 months gap is OK, you can go ahead with your plan.
I hope this information will be helpful.
If you have any query, please feel free to ask.
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Wish her healthy life.