Okay, so I was just reading up on the noro virus and I read that hand sanitizers need to have benzalkonium chloride in order for them to kill the noro virus. So, like a paranoid freak I dumped my "collection" of hand sanitizers on to my bed to read all the ingredients and I have been let down. Only ONE of my brands of sanitizers was benzalkonium chloride based! ONE. So I've been trusted my hand sanitizers to keep me healthy at school when I cant be washing my hands all the time and they have been doing NOTHING to keep me safe. Now I need to go out and buy new sanitizers and get more of the one brand that actually works.