At various phases of their invasion and replication, viruses hijack distinct cell organelles such as endosomes, endoplasmic reticulum (ER), Golgi complex, mitochondria, and nucleus, starting from the cell membrane with a wide assortment of receptors.
A virus may inject its genetic material into its host cell when it comes into touch with it, effectively taking over the host's activities. Instead of its regular output, an infected cell generates more viral protein and genetic material.