Grandparent plague

It has been a consistent pattern. The grandparents come and everyone gets sick. We made it through the entire winter without a single cough or runny nose since the grandparents left last fall. As I predicted within a week of the grandparents arrival the noses started to run and the coughs started to bark and throats turned sore. It starts with the kids, then moves to the the grandpa and the dad and eventually to the grandma that has the cold until the next season we see them. So no more sickness is expected until later this summer when the granparents might return.