A recent study from the American Journal of Infection Control revealed that the common belief that closing toilet lids before flushing prevents airborne contamination is largely unfounded. The research found that whether the toilet lid was up or down, viral contamination levels remained nearly identical. This challenges assumptions about bathroom hygiene and highlights a misconception regarding toilet plume and its potential to spread infectious bioaerosols, which can settle on surfaces or remain airborne, thereby increasing risks of infection.
While it has long been purported that closing the toilet lid before flushing prevents the spread of harmful bacteria and viruses, recent studies show it has minimal effect.
The 2024 study by the American Journal of Infection Control reveals that lid position does not significantly alter viral contamination spread, regardless of whether it's up or down.
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