Mumps
My twenty-something adult kids were part of an outbreak in Calgary in 2008. I thought they had immunity for life until the call went out from the public health officials that re-vaccination was the only form of prevention for this age group! There is a whole generation in the late 20’s to mid-30’s who are susceptible to these childhood illnesses. Both my young men were concerned about possible complications of mumps so they asked mom/homeopath for prevention.