The company Vaev claims to be selling tissues that have already been sneezed into. For about $80 it seems that you get a box containing one infected tissue. The idea apparently is that you can infect yourself with a cold, and this will somehow strengthen your immune system, thereby protecting you from further colds or the flu. Although the company’s website is very vague on details, offering only this:
We believe that when flu season comes around, you should be able to get sick on your terms. We’re not about chemicals or prescription drugs here at Vaev. We believe using a tissue that carries a human sneeze is safer than needles or pills. This isn’t like any tissue you’ve used before, but we love using them, and you will too.