Veganism is a subclass of vegetarianism. These people are much stricter in what they eat. No animal products at all--no eggs at all (not in cakes, ice cream anything), no dairy...some are so strict that they refuse to wear anything that might come from animals in any way too.
As for Kareena...Shahid probably did influence her, but she must feel strongly about being a vegetarian too otherwise she probably would have converted back by now.
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