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。