A MA is performing hand hygiene using an alcohol-based hand rub. The MA should recognize that which information about alcohol-based hand rubs is correct?
1) Alcohol-based hand rubs are less effective than soap and water in killing germs.
2) Alcohol-based hand rubs should be used for at least 10 seconds to be effective.
3) Alcohol-based hand rubs can be used on visibly dirty hands.
4) Alcohol-based hand rubs are only effective against certain types of germs.