Most scientists studying the Exsurgence virus think they can discern a definite purpose for most strains, which typically amounts to "creating minions or sleeper agents" in enough different ways that the opposition is kept on their toes. The Bootstrap strain, however, has attracted more wild guesses as to its purpose than any since Watts-MacLeod. This strain is unique in that it doesn't affect transhumans, uplifts, or AGIs, but rather non-sapient animals, either unmodified or "smart" variants. Already sapient beings can carry the virus, but it doesn't seem to affect them at all, though most cases have also been infected by another strain. The first recorded occurrence of the Boostrap virus was carried by an Exsurgent zookeeper working in a wealthy hypercorp executive's private menagerie habitat. He infected several of the animals before Firewall intervened, most of the information on the virus comes from the records of the other zookeepers and observations made by the Sentinel team that investigated. The zoo habitat was nuked after the Sentinels submitted their report. Some hypothesize that the Bootstrap strain is intended simply to sow chaos in wild areas or habitats dependent on smart animals. Others think it's supposed to produce a new set of infectees following the extinction of the primary sophont species. Some conspiracy theorists even believe that it was developed by one of the scientists at Fortean to accelerate uplift of new species.