New evidence indicates that children who are exposed to a virus called adenovirus-36 are more likely to be obese than those who are not exposed to it, and to be heavier than other obese kids who were not exposed to it, researchers said this week. The virus, known informally as Ad-36, is one of about 55 adenoviruses that are known to cause colds and is the only member of the family to be linked to obesity. But it is one of 10 bacteria and viruses that have been associated with a propensity for putting on plural poundage.

More evidence links a virus to obesity, this time in children – Los Angeles Times