ROSEOLA:
A viral illness with a characteristic rash, also called exanthem subitum.
SYMPTOMS:
Cold symptoms followed by a fever of up to 106 degrees. The fever persists for about 5 days, the fever breaks, and then a rash develops. The rash starts from the trunk and spreads outward. It lasts about 3 days and then fades away.
CAUSES:
Viruses, called human herpes virus 6 and human herpes virus 7.

RUBELLA=Rubeola o Sarampión Alemán
A viral illness with specific symptoms, also known as German measles or 3-day measles.
SYMPTOMS:
Congestion and runny nose, followed by swelling of the glands behind the ear and on the back of the neck. Following this, a rash develops on the face and then progresses to the whole body. This rash will usually last 3 days.
CAUSES:
A virus.
CONTAGION:
This illness is contagious through the course of the illness. The incubation period is 14-21 days.

Espero que le ayude a su traducción.
Mucha suerte y saludos de Oso ¶:^)