If you’re sick – and you’ve been using the same tissue to blow your nose all morning – is that a problem? Well, according to Dr. Wendy Bennett, an internist from Johns Hopkins, that ratty tissue won’t hurt you – but it could hurt those around you. Because each time you touch the tissue, you’re touching your germy mucus – and wherever your hands land afterward will be contaminated with your virus. So grab a new tissue. Or sneeze into your elbow, since that’s less likely to touch other surfaces or people.