What is the meaning of non persistent?

: not persistent: such as. a : decomposed rapidly by environmental action nonpersistent insecticides. b : capable of being transmitted by a vector for only a relatively short time nonpersistent viruses.

What's the opposite of persistence?

Antonyms: changeableness, fickleness, idleness, inattention, inconstancy, indolence, neglect, negligence, remissness, sloth. Synonyms: application, assiduity, attention, constancy, diligence, effort, exertion, industry, intentness, labor, pains, patience, perseverance, sedulousness.