Nonspecific

Adjective

 * 1) not specific
 * 2)  not caused by a specific pathogen
 * 3)  not caused by previous infection or vaccination
 * 4)  that does not just stain one type of tissue

Thesaurus
abstract, aleatoric, aleatory, amorphous, bland, blobby, blurred, blurry, broad, chance, chancy, chaotic, collective, confused, disordered, featureless, foggy, fuzzy, general, generalized, generic, hazy, hit-or-miss, ill-defined, imprecise, inaccurate, inchoate, incoherent, indecisive, indefinable, indefinite, indeterminable, indeterminate, indistinct, inexact, lax, loose, nebulous, neutral, obscure, orderless, random, shadowed forth, shadowy, shapeless, stochastic, sweeping, uncharacterized, unclear, undefined, undestined, undetermined, undifferentiated, unplain, unspecified, vague, veiled, wide