Yes, I have received three full doses of Moderna and now was told by my oncologist to get a fourth dose but this time to get Pfizer as it effects different varients

I asked my MPN Specialist about a fourth booster and he told me that was not necessary as long as I had the 3 Moderna shots that I would be fine.

I am on Hydrea and was told to get the Pfizer booster but have not heard of a 4th vaccine. I have a Drs. appointment next week and will let you know what she tells me.

My Dr. had me get the 2nd booster.
It was the Pfizer all 4 were Pfizer.

Modera