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Many people believe that putting the toilet-seat lid down helps to prevent the spread dangerous germs and viruses. A recent study pretty much dispels this supposition. A team microbiologists the University of Arizona conducted research the aerial activity of viral particles after a toilet is flushed. The scientists determined that there is little difference the spread of germs, regardless whether the lid is up or . Microbiologist Dr Charles Gerba has been studying lavatory pathogens nearly five decades. He said: "All that air when you flush goes somewhere, and it carries the viruses that are in the toilet bowl of it." He said a flush forces bacteria out under the lid and contaminates nearby areas.

The researchers tested the spread a test virus in two bathrooms after a flush. The virus was one not able to infect humans. They flushed one bowl the lid up, and another the lid down. After a minute, they used a sponge to swab the surfaces the toilet. They concluded that there were no significant statistical differences the quantities the virus in the two bathrooms. They added that the results "demonstrate that closing the toilet lid prior to flushing does not mitigate the risk contaminating bathroom surfaces, and that disinfection all restroom surfaces may be necessary after flushing or after toilet-brush use" to cut the spread germs. They also said it was important to disinfect the water the bowl.