"A lot of people said all you have to do is close the lid and the problem is solved," said Gerba, who has been studying toilet germs for nearly a half century. "All that air when you flush goes ...

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Furthermore, Castro emphasized that while closing the toilet's lid while flushing might minimize the plume's reach, it doesn’t entirely eliminate the risk of spreading pathogens.

They concluded that flushing with the toilet lid down reduced airborne droplets between 30 and 60 percent. But this scenario also increased the diameter of the droplets and bacteria concentration.

Impacts of lid closure during toilet flushing and of toilet bowl cleaning on viral contamination of surfaces in United States restrooms, Goforth, Madison P. et al. American Journal of Infection ...

Research uncovers why leaving the toilet seat up could be affecting your family’s health more than you think By Khalil Best Feb 24, 2025 11:45 am Photo credit: Shutterstock.com / Pixel-Shot ...