Hutterite Influenza Study

It's 6:30am, and the most horrible sound in the world shreiks through my ears, and goes directly to my head, yeah it shreiks. With my eyes still closed, I reach out with one hand, and hit the snooze button. I'll probably be doing it two more times until I acually forfeit and drag myself from this incrediblally warm cacoon of mine.
Just as I slip back into the REM sleep cycle the phone rings upstairs, and my mom proceeds to answer it, of course, she is already up. Well what do you know? It's for me. Who on earth would want to talk with me at 6:35am?
"It's Eleanor,"my mom says. "Who, Roosevelt?" I ask, knowing pretty well which Eleanor.
It's the flu study nurse reminding me that she will be coming this morning to pick up the flu diaries, and do any necissary swabs.
After a short morning chit chat, we hang up, I make an effort to page and let everyone know they have to bring their flu diaries to breakfast.
So, after breakfast I sort through all the papers, filling in the colony number and nurse number. I also notice there are a few symptoms written on some of the families' papers, so there will be some swabs.
The question seeks an answer. What is the study all about?
The 'Hutterite Influenza Study' is done in 49 remote Hutterite farming colonies in western Canada.
This study is about seeing if children aged 3-15 are vaccinated with the flu shot will offer protection to the older age group and the very young. Because this is a study the control group is given Hepititis A vaccine (so they will receive a benefit instead of a placebo). 50% get a flu shot and 50% get the Hepititus A.
Only the vaccination nurses and the private company know who gets what. Even the study nurses and Dr. Loeb (Dr.Loeb MD. is founder and in charge of the study) don't know. That's why it's called a 'Double Blind Study'.
Evidence is obtained from several scientific ways- like blood samples, everyone gets to start the season. After they had a shot, another blood draw is necissary to see how it worked.
Also during surveillance season, flu diaries are kept of all the symptoms, and if a person has 2 or more flu like symptoms, a nose swab is given.
Already at this point in the study, it is recognized that the colonies which receive the flu shot are 60% healthier.
Articles about the flu study have also been published in The New York Times and Jama, one of the world's leading medical journals.