 Other members of this viral family include poliovirus, "Hepatovirus A", and the viruses causing the common cold (rhinovirus).One of the earliest scientific discoveries regarding "Parechovirus B" was that infected wild rodents developed diabetes if they were exposed to stress.This has led to speculation that this disease may be the underlying cause of fluctuating rodent populations in Scandinavia; when rodents increase to high densities, they find it difficult to defend territory and obtain food, and then become more susceptible to predation.