Within days, the bees immediately began collecting more resin for their nests. Normally, there are only a few bees in each hive that forage for resin, the majority forage for pollen or nectar. Bees do not eat resin; its only function is to line the nest, so not much energy is used by the hive community to collect it. But when the hive is under threat from a parasite like Chalkbrood, more bees begin to forage for resin and a lot of energy is used to find it. The nests painted with resin, although infected at the same level, also had a reduced level of infection compared to the commercial standard nests, but the level of infection in all nests dropped as the amount of resin in the nest increased. The bees were using the resin as a form of social immunity rather than self-immunity.