thats right, Immunologist tell us that one of the things we do not want to do a lot of is touch our face. touching our face is one vector for viruses to infect us. Seems we tend to pick up a lot of gersm with our hands, touching our face brings them in much closer proximaty to our mucus membranes where they can more easily invade out bodies and infect us.
given this fact, and the fact that using a straight leads most men to continously touch their face through the day to feel how smooth it is, one can only conclude that shaving with a straight can lead to more disease