Perform the indicated operation. 
Definitions:
Nutritional Status
An assessment of an individual's health as influenced by the intake and utilization of nutrients.
Virulence
A microorganism's disease-producing power.
Opportunistic Infection
Infection by microorganisms that can cause disease only when a host’s resistance is low.
Microorganism
Minute living organisms, such as bacteria, viruses, fungi, and protozoa, that can be seen only with a microscope.
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