@DonEford @michaelmina_lab It may only take a single viron to start an infection but the more virons there are, the more likely it is that one ends up attaching to one of your cells instead of sticking to a wall or something.
@DonEford@michaelmina_实验室可能只需要一个病毒子就可以开始感染，但病毒子越多，就越有可能附着到你的细胞上，而不是粘在墙上或其他东西上。