The problem with this type if thing is, you are not being overly germaphobic... but these people, KNOWINGLY.... still bring their sick kids to a play-date or party. They know it. But then they expect the others or you, to just loosen up about it.
Versus, if you are at a public place or mall, sure there are sick people there too. But, they are not an invited guest to your house. And you don't know them nor do they know you so there is no "obligation" for them to tell you they are sick. They are just, at a public place, like anyone else.
With me and my friends, IF one of our kids or family member is sick they tell me and I tell them. Then, THEY can decide what to do. ie: stay home or not bring their kid or I can tell them too that I opt out. Fine. Its fine amongst me and my friends.
It is RUDE as hell, to still bring a sick kid to a play-date or party... KNOWINGLY. And then expecting all others and the Host, to be fine with it.
Me: I have Asthma. Therefore, if anyone is sick, including my own kids... I DO NOT LIKE IT. Because, if I get sick, it can EASILY compound into a very serious, illness for me. Because I have other health issues. Asthma.
But sure, if MY family members or kids are sick, I do tend to them as any Mom would. Because they are MY family. BUT... with others or invited guests... IF they are sick, I tell them, to stay home. I don't want to get sick, nor get my kids sick. And if my Husband is sick... I have told my friends. Then, it is up to them... if they still want to come over or not.
And YES... rescheduling... is the thing to do.
Or, put medical face masks on... when those sick guests arrive. And put out hand sanitizers. Duh. What a hint, right?
I personally, do not KNOWINGLY.... take my kids to someone else's home if they are sick. No matter what the occasion. And likewise, I do not invite those that are sick, to my home. I tell them we can reschedule. And among me and my friends, it is FINE.
In my State, last year... a 6 month old baby died, due to Pertussis. He got it from a relative, who thought she just had a normal common cold. And the parents initially thought their baby was just sick with a common cold. BUT... it was Pertussis. And sure they took their baby to the Hospital. But the baby died.
So, as you see... people who are sick, should not be around others socially. Because, they can get others sick. And more.
The problem is: with people who KNOWINGLY.... still bring their kids to social occasions to people's homes, and just think nothing of it.