Why can’t I donate blood if I’ve lived on a military base during certain years?

I tried to donate blood but they said that since I had lived on a military base in Turkey in 1989 that I was not eligible. Does anyone know why? Just curious.
because of the people you may have come in contact with during that time

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Does anyone know the life span of donated blood & the best methods to keep it save & not destroy its quality ?

Such as what the best temperature, condition, container,..to keep it save & unaffected.
What is the best refrigerating temperature for it ?
i always ask these kind of questions when i am giving blood and if i remember correctly it only last for like 4 days – they keep it in vinyl bags in a fridge until [...]

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Donate blood..?

I live in India,my age is 14.Can I donate blood if I want.my blood group is O-.I can save many lives because it is a rare blood group.Is there any law about donating blood? I thank all in advance.
Yeah I was mistaken.O- is not a rare blood group
I have no idea about India, but [...]

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