obsolete suppression by virus of host complement activation https://github.com/geneontology/go-ontology/issues/26686 true OBSOLETE. Any process in which a virus stops, prevents, or reduces the frequency, rate or extent of complement activation. The activation of complement involves the sequential proteolysis of proteins to generate enzymes with catalytic activities. The biological functions of the complement include opsonization, inflammation, lysis of immune complexes, or enhancement of the humoral immune response. For example, the virus complement control protein (VCP) of vaccinia virus, and the complement control protein of herpesvirus inhibit C3 convertase. This term was obsoleted because it represents the same process as symbiont-mediated suppression of host complement activation ; GO:0042784. biological_process bf GO:0039573 inhibition of host complement cascade by virus inhibition of host complement activation by virus symbiont-mediated suppression of host complement activation