The disease that includes symptoms like high fever, runny nose, and a dusky red rash over the trunk of her body and extremities is Measles.
MMR stands for Measles, Mumps, and Rubella vaccination.
It is the vaccination given to infants to prevent these three diseases.
As Mrs. Jacob did not give the MMR vaccination to Ivy and as she developed symptoms like high fever, runny nose, and a dusky red rash over the trunk of her body and extremities, it is the possibility of measles.
Thus, the correct option according to the given scenario is C.
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