Going out while Sick

This has always been a point of frustration with me.
If you are sick, STAY HOME, If your child is sick KEEP THEM HOME.
Seriously people, Is it too much to ask to not take your coughing, sneezy, slobbery, snotty nosed self out in public?? Now FTR I'm not speaking of trips to the doctors office, trips to the pharmacy or emergency shopping trips for medications, pedialyte or an easy to eat while sick meal. I am speaking of those people who take their coughing, sneezing, green nastiness, obviously sick all over the place self and/or child to library time, to a playground or to a store for a non-necesity trip. You do not NEED to go to the thrift store when you are sick!!  Nor do you need a hair cut, manicure or tan. Your child will not be missed at the library their birthday party can be put off and you do not need to attend your friends-cousins-uncles birthday party, I can assure they do not want your germs as a gift and they may just thank you for calling and canceling!!
When I see a sick person in public (at St Vinnies, at Goodwill, at the Spa, etc...) I can't help but think they must really not care about the health of others (namely young children, the elderly and those with compromised immune systems.)
We are a very healthy family (have only been sick 4x in the past 12 months which is excellent considering on average children get 6-10 colds/flu's per year) you put ANYONE in a closed room (ie library time) with an obviously sick child and one of the 5 of us that goes is likely to get sick.... and if one of my 2 daughters gets it then the other will because they share a room.
I am especially passionate about this now because my 2 yr old has "respiratory distress syndrome" which basically means that when she gets sick she gets asthma like symptoms which could land her in the hospital.

Anyhow--Rant Over PLEASE KEEP YOUR SICKIES AT HOME.