In an earlier video on bad trail advice, I mentioned norovirus and water treatment in passing, but the message that landed wasn’t quite the one I intended. This video sets the record straight. Norovirus is one of the most contagious pathogens on the planet, and while contaminated water is a real risk, it’s not the primary way hikers get infected. Person-to-person contact and contaminated surfaces such as trail registers, outhouse handles, shared cookware, and bear box latches, are where norovirus really moves on the trail. I cover: Why your water filter provides zero protection against viruses The difference between filters, purifiers, UV sterilizers, and chlorine dioxide Why hand sanitizer isn’t enough against norovirus specifically Practical habits that actually reduce your risk on the trail