Leanna Munir was a 6-year-old bundle of energy two years ago, until one day her vim and vigor vanished without warning.
"I couldn't force her to come in the house after school or sit down," recalled her mom, Adrian Horn. "Then, she just started slowing down a lot and it was not like her. So that's how we knew something was wrong."
Repeated colds and fatigue led doctors to think she might have strep throat or tonsil problems, but it wound up being something far worse -- leukemia.
But Leanna, now 8, survived her cancer and is thriving, thanks to immune therapy breakthroughs of the past decades.
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