As far as common colds go, the average child under 2 years of age has EIGHT colds a year. Frankly, if you plan on keeping your child at home until your little toddler is free from a runny nose, you will be waiting a very long time before you leave the house.
Hand Foot Mouth issues come up a lot. I respect that schools want to keep this yucky virus from getting spread around. Patients can shed that virus in their stool for several weeks. I would suspect that there is a reasonable chance that the infected kids likely got it from school in the first place and/or were contagious before they were identified and segregated.Since I don’t think schools are able to genuinely keep them out until they are completely clear, I suggest common sense guidelines. If they have a fever keep them home. If they are fussy and miserable, they will be much happier home with mom or dad. If they seem to be feeling okay and are fever free, for the above reasons, I don’t think it is reasonable to exclude them from daycare/school until all the blisters are gone. Kids are going to get this.