Scientists have discovered "migrations", which are viral structures that accelerate the spread of infection.[3] Migrions occur when infected cells assemble viral material into large structures called migrations and transfer them directly to new cells.[1] These structures contain not one but dozens of copies of the viral genome at once, forming a collective infectious unit.[2] Migrions allow viruses to enter cells by endocytosis without the need for specific receptors, and under acidic conditions trigger membrane fusion, releasing viral particles.[3][4] This mechanism initiates viral replication and increases disease severity by defying classical models of infection spread.[1] Migrions also include damaged organelles, such as mitochondria, and may help viruses evade the host's immune response.[1] They have been observed in viruses such as CHIKV, poxviruses and HSV-2.[1] This discovery reveals a new route of viral spread based on cell migration.[3]