Viral antigens are proteins produced by virus-infected cells that can cause those cells to go berserk and start multiplying out of control, thereby becoming cancerous.

• 病毒抗原是蛋白质产生的病毒感染细胞，从而导致这些细胞中去的工作坊，并开始繁殖失去控制，从而成为了癌变。