Occlusion bodies are protein lattices that protect infectious particles after release into the environment. This strategy is mostly used by insect viruses to keep long-term infectivity of tissues after the host death. At the end of infection, host-to-host virions are embedded into the protein lattice formed by the occulsion protein produced in great quantity. When the cell dies, the occlusion body persists andprotect in the long-term the infections virions. Indeed, when a larvae dies form such a virus on a leaf, occulsion bodies are deposited on it and can stay infectious until another insect arrives to eat the leaf and ingest the protected virions.