If you're a parent (or know one) ... you might have already made up your mind about the connection between vaccination and disease. A new documentary, The Greater Good, adds perspective to the issue, asking how much of a good thing a person can take until it's not all that good any more. "It is an advocacy film," says The Greater Good producer Chris Pilaro. The filmmakers chose to follow three families whose lives were adversely affected by vaccines because, as director-producer Kendall Nelson says, "Historically, those stories were really not being told." One thread follows young Jordan King, who before being vaccinated was a "normal," happy toddler. After being vaccinated... he ended up diagnosed with autism. After her youngest child died after receiving vaccinations, Stephanie Christner, a doctor, dedicated her life to finding connections between vaccination and disease. The most persuasive story is that of Gabi Swank, a teenage girl who saw ads on MTV for the cervical cancer vaccine Gardasil and insisted that her mom get her on it. After taking the drug, Gabi experienced a dramatic decline in her health and her family paid a deep financial and emotional cost. Despite her upbeat demeanor and refusal to be perceived as a victim, Gabi's story is a tragic one. Idaho-based filmmakers Nelson and Pilaro ... gained the co-operation of the Centers for Disease Control and Prevention and the Food and Drug Administration and proceeded to interview medical experts, pharmaceutical representatives and lawmakers on opposite sides of the issue. What's clear after watching the film is not that vaccinations are necessarily bad, but that every child is different and each will have a different response to them. But it's a hard case to make when your doctor is following state law.