新闻原句But a major new study on mice indicates that the impact of the Zika infection in other adults could be far more serious and sinister than had previously been thought. Experiments on adult mice engineered to mimic human Zika infection show that the virus seems to attack immature cells in the adult brain. Those same cells are vital to learning and memory – and so losing them could have disastrous effects, comparable to those experienced by people with Alzheimer’s.