`Give me the calcium!` Tulane virus takes over cellular calcium signaling to replicate
(PHYSorg.com Biology)

Some gastrointestinal viruses need calcium. They need calcium ions to carry out several essential aspects of viral life, such as item into host cells, genome replication and building new viruses to invade other cells. The cells invaded by viruses also use calcium. They use it as signals to regulate many of the cells` own processes, but viruses can takeover cellular calcium signaling to satisfy their own needs.