the.com/rubella

means A mild viral infection causing a fine pink rash and swollen glands, notable mainly because it can cause severe birth defects if caught during early pregnancy.

from Latin 'rubella' simply means 'little red one' — from 'ruber,' red, with a diminutive ending. It was coined to distinguish this rash from measles proper; in fact the disease is still sometimes called 'German measles,' a name that stuck because German physicians were among the first to describe it as a distinct illness, not because it's more common in Germany.