Saudi Arabia

If you have visited Saudi Arabia, you will have to wait 4 months from when you left the country before you can give blood. However, if you only visited the cities of Jeddah, Mecca, Medina, Riyadh or Ta'if, then you must wait 1 month before donating. 

If you are a native of a country with endemic malaria or have resided there for more than 6 months, and you have travelled to Saudi Arabia, you will have to wait 4 months from when you left the country before you can be a blood donor.