The human immune system is adept at recognizing antigens it has met before: Antibodies snap onto the projecting viral proteins and prevent the organism from infecting other cells. (discovermagazine.com)
«But I don't think anyone had fully appreciated the sheer number of parasites that are free and able to infect other cells in the vasculature.» (sciencedaily.com)
This interplay is important for the virus to break free of the host cell's plasma membrane and continue infecting other cells. (sciencedaily.com)