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Hosszú holds the world record in the 200-meter individual medley, a record she set at the 2015 World Aquatics Championships in Kazan, Russia. Hosszú's time of 2:06.12 was 0.45 seconds faster than the previous record, which was set by American Missy Franklin at the 2012 Summer Olympics in London. Hosszú's record in the 200-meter individual medley is one of several world records she holds in the sport of swimming.