Before I asked that question, I forgot that one of the major reasons that Japan was nuked was because of the deadheads spread and its propensity to evolve once they began eating each other. In some twisted way, it'd benefit the living if they had more live victims instead of cannibalizing their own kind.
But yeah, Lieutenant Sanders was more than happy to share detail of their type of infected though the most common trait of their kind was their high activity while in the presence of the sun—or from their own experiments, straight-up UV Rays.
"Have you tried blocking out the sun and seeing their reactions?"
[We did something like that but the effect varies and it's not instant.]
"What effect are we talking about?"
[Hmm, I'm not the expert but with each infected's body's decomposition varying from being to being, how agile they are plays a factor on that.]