immunization or immunisation? - (Jun/10/2008 )

may i know is it "immunization" or "immunisation"?
my friend told me that one is american english, another one is british english.
which one should i use?

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Your friend is right, Americans use z instead of s in a lot of words. I personally would go for the s, but I don't think it matters as long as you are consistant.

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If you're writing an article- then check whether its an American or British one- then use the appropiate one(as Lauralee says).
If its for something else then as long as you're consistent then it doesn't matter.

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even some originally based British journals meanwhile accept American spelling; what to use is definitely described in the author's instruction of each journal

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Why don't British and Americans agree to one common spelling?

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i prefer to use the one i pronounce
in this case, i would go for z

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to confuse people, esp. young children.

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Because Daniel Webster wanted to create a unique spelling for the US to help create an identity separate from Britain.

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I usually take the mean of the two when writing something.

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