undetectable effect
[/ˌʌndɪˈtɛktəbəl ɪˈfɛkt/]
nounpl: undetectable effects
efeito indetectável
1. A result or consequence that cannot be perceived, measured, or discovered through available methods or instruments
The drug had an undetectable effect on the patient's symptoms, making it difficult to assess its efficacy.
O medicamento teve um efeito indetectável nos sintomas do paciente, dificultando a avaliação de sua eficácia.
2. In medical/scientific contexts, an outcome or influence so minimal or subtle that it cannot be identified or verified
The virus reached an undetectable effect on the immune system after treatment.
O vírus atingiu um efeito indetectável no sistema imunológico após o tratamento.
This term is primarily used in scientific, medical, and research contexts in both Brazil and the United States. It gained particular prominence during discussions of HIV treatment, where 'undetectable' refers to viral loads below detectable limits. The phrase is formal and technical, rarely used in casual conversation.
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