Nettle rash and hives are caused by virus, scarlet fever is caused by the bacterium. 风疹和麻疹是由病毒引起的,猩红热是由细菌引起的。
The rubella irus causes a rash, mild feer and arthritis, but in pregnant women, it can lead to a miscarriage or birth defects, according to the CDC. 风疹病毒导致出疹,轻微的发烧和关节炎,但是根据疾病控制和预防中心的观点,对于孕妇,它可能导致流产或胚胎发育紊乱。