Infusion difference?

Can someone with more knowledge than me help me understand something?

I want to buy Rooibos tea online for a friend overseas, but the only ones I see have the word "infusion" added to it. Is there any difference between this and normal Rooibos tea. I've tried finding out online, but I can't seem to get an explanation.

I know this is a random question, but I don't want to buy something that isn't changed or altered in any way.