My son has roseola infantum. can my wife (20 weeks pregnant) still take care of him?

Roseola in pregnancy: Evidence suggests that 95% of pregnant women are already immune to Roseola as a result of previous exposure as a child, and active disease in a pregnant woman is rare. In the event of new exposure in early pregnancy, increased risk of miscarriage is present. Active disease later in pregnancy increases risk of birth defects.