Eye infections?

over the past 3 months or so, everyone has had some type of eye infection. I had shingles in my eye for over 2 months. My 14 yr old had pink eye for just a couple of days ( i got rid of it using antiviral drops). My husband got an eye infection a few days ago that left his eye swollen underneath. I washed his eye out and did the same for him as with my daughter and it is going away. Are these eye infections a symptom of some illness? I had a fever about a week ago for a couple of days. I haven't gotten a fever in years. My 5 yr old has had a low grade fever as well on and off for a couple of days.