Diluting bleach makes it more effective at killing viruses
the verdict
REFUTED
the evidence says no
confidence 11/100
Scientific evidence refutes the idea that diluting bleach makes it more effective; higher concentrations and adequate contact times are required for optimal virucidal activity.
Evidence against · 3
Development of a Test System To Apply Virus-Containing Particles to Filtering Facepiece Respirators for the Evaluation of Decontamination Procedures
2009 · cited by 63
Paper [0] demonstrates that higher concentrations of sodium hypochlorite (e.g., 0.6%) effectively achieve high log reductions of viral loads.
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More against · 2
<i>In vitro</i>virucidal activity of sodium hypochlorite against canine parvovirus type 2
2018 · cited by 41
Paper [1] shows that while lower concentrations can work, they require substantially longer contact times, indicating that higher concentration is more potent for rapid efficacy.
Efficacy of certain disinfectants against infectious pancreatic necrosis virus
1978 · cited by 39
Paper [2] establishes that chlorine efficacy depends directly on maintaining adequate concentration levels to neutralize viruses.