sentences:  A 2012 review (Cresswell et al., 2012) concluded that dietary neonicotinoids cannot be implicated in honey bee declines, but this position is provisional because important gaps remain in current knowledge.A 2013 review concluded that neonicotinoids, as they are typically used, harm bees and that safer alternatives are urgently needed.An October 2013 study by Italian researchers demonstrated that neonicotinoids disrupt bees' immune systems, making them susceptible to viral infections to which the bees are normally resistant.