全世界有数以百万计的病毒。它们种类繁多，但有一个共同点。由于它们存在于细胞外，因此被称为病毒子，由核心 RNA 或 DNA 分子、被称为囊壳的原生外衣组成，囊壳包围并保护遗传物质。有时，蛋白质也被称为脂质的包膜所覆盖。.
“Viral infections”的5个回复
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