Posted By Ian Harper Being involved with the LA I come accross this issue myself. One of the more interesting health aspects is from drug users. In the interest of preventing disease spreading through drug users clean needles are issued to those who want them. Usually during the day, which are then discarded or placed as traps in the toilets themselves. Although most disease only survives for a short time outside the body, such as HIV or hepatitis this goes on during the day so the cleaners are there sometimes minutes after the event. This obviously depends on the area you work in but you might be surprised to the level of drug use today. Other diseases are such things a weils disease as the water and waste that can collect can attract rats. Most other infections I regard as no more dangerous than the toilets that the company supplies for the employees and as such it is up to the individual to maintain their own levels of hygiene. One other area is through the cleaning itself and incidents due to the substances used. Incorrect dilution rates and spills not cleared up etc. Hope this helps Ian Harper