mRNA vaccines are being . Those seem to be in clinical trials which would take many years to establish if they are safe and effective.
mRNA vaccines are being [tested for cancer treatment](https://www.mdanderson.org/cancerwise/can-mrna-vaccines-like-those-used-for-covid-19-be-used-in-cancer-care.h00-159457689.html). Those seem to be in clinical trials which would take many years to establish if they are safe and effective.
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