Age Restrictions are put in place by almost every country in the world. Those countries that do not specifically write age limits, will disqualify older first-time donors.
As we age our ability to replenish red blood cells reduces. It is to protect the donor's health.
Every Country has rules to protect both the Donor's Health and the Patient's health.
. The regions impacted by the vCJD disease are the UK, France and Ireland. From 1980 to 1996.
Most countries in the World do not accept those donors.
Every other country is not restricted, such as the USA, Germany, China, etc... as these areas were not Variant Creutzfeldt-Jakob disease areas. "Mad Cow Disease".