For instance, while bacteria germs cause minor illnesses such as ear infections, sore throats and cavities, viruses cause more serious diseases such as chicken pox, measles and the flu.

• 例如，细菌通常引起诸如耳炎、喉炎和蛀牙这些较轻的疾病，而病毒却能导致严重的疾病，比如水痘、麻疹和流感。