Yes, it is true, there is a such thing.
Sherwin Williams: Paint Shield® microbicidal paint is redefining what paint can do. It is the first paint that kills 99.9% of bacteria, including Staph (Staphylococcus aureus) and E. coli (Escherichia coli), within two hours of exposure on a painted surface. Not just for hospitals and day-care centers, Paint Shield® is ideal for homes, too — in kitchens, bathrooms and laundry rooms.