👉 A viral fluid, also known as the viral envelope, is a lipid bilayer membrane that surrounds some viruses, derived from the host cell's plasma membrane during viral budding. This envelope is studded with viral glycoproteins that facilitate attachment and entry into host cells, allowing the virus to evade the immune system and mediate infection. The fluid nature of this envelope enables the virus to fuse with cellular membranes, aiding in the release of viral genetic material into the host cell. Without this envelope, many enveloped viruses would be less infectious and more susceptible to environmental factors.