Viruses don't technically eat, but they do consume. Depending on what kind of virus it is, a virion will hijack a specific type of host cell and then steal that cell's energy to feed its own ...

A recent study showed that the HCMV virion contains not only DNA, but also four species of mRNA, indicating that this virus is more complex than previously believed. HUMAN CYTOMEGALOVIRUS (HCMV ...