The statement, defects in components of the complement pathway do not lead to recurrent or persistent virus infections, is true.
In our body, the complement system is made up of a large number of distinct plasma proteins which react with one another to opsonize pathogens and induce a series of inflammatory responses which in order help to fight against viral infection.
On the other hand, if a person has defects in components of the complement pathway, or the person has deficiencies in the complement cascade, then this can lead to overwhelming infection and sepsis.
Hence, the complement system is a mediator in both the pathogenesis and prevention of immune complex diseases. So the statement is true.
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