H1N1: To Tell or Not to Tell?

There are times in life when you want to just shake someone hard enough to loosen the idiotic thoughts that cause them to do things that many others wouldn't dare do or even say. With all the facts and myths that have been circulating the media, one would need to take basic care of themselves and others around them.

In a household of members, if one was treated for H1N1 there is a possibility that others could take ill, especially young children and their primary caretakers. For some viruses, the contagious period occurs prior to the onset of symptoms. So it is possible for an infected person to transmit a virus, unknowingly.

A situation happened recently that still has me in awe. I wonder what thought patterns can others have that I can't comprehend.

A young mother held a birthday party for her child in her home. One to two months prior, she was treated for H1N1. Since her treatment, others in the household had been ill but not specifically identified as this virus. Knowing others were ill, she had the party with many family members and friends, including many small children. Her reasoning is, by spraying the household with Lysol, it was ok. She nor did any others in the household feel the necessity to inform the adults or parents of any children who planned to attend the party of the health issues in the home so they can make a personal decision whether to attend.

Compounding the issue is that a few days after the party, another member, a child, of that household was diagnosed with H1N1. This mother nor any of the other adults in the home notified everyone who attended the party, so they can be particularly watchful of their kids health.

I just don't understand them. Can anyone validate their reasoning to me?