Six Word Saturday

Being thankful for - white blood cells??? 

With three kids in three different schools and me teaching at a university, viruses come around our house often and I am guessing most of family has built up a pretty good immunity.  This week however, that immunity didn't work out so well as a cold ripped through the household.  During this week of thankfulness, add white blood cells to the list. 

So hooray for the biological sciences...