Dr. Grumpy: "These things can spread through the air, too."
Mr. Bassi: "Yeah, but I was hoping the washing would help me ward off anything."
Dr. Grumpy: "What do you mean?"
Mr. Bassi: "Well, they say washing hands helps prevent disease."
Dr. Grumpy: "That's true..."
Mr. Bassi: "Isn't it because water and soap boost your immune system?"