1 You must wait at least 12 months following the completion of treatment to donate your blood. 2  You cannot have had a recurrence of cancer.  If you are currently in treatment, then you are ineligible to donate.
The Royal Road helped the Persian Empire by uniting the empire, delivering mail,and promoted trade and businessthroughout the empire. When the Royal Road unitedthe empire everything started to happen, the delivered mail and the promotion oftrade and business. The Royal Road was for government purposes.
How did roads contribute to the empire success? Roads facilitated communication between the various parts of the  vast Roman Empire. This facilitated general travel, the transport  for goods for trade and the journeys of â¦officials and state  messengers to the provinces of the empire.