we started k at daycare so she could be around other kids to be social as well as to learn from them. of course with exposure to other people, especially kids, comes germs. a friend’s daughter almost a year older than k started in daycare when she was 3 months. a friend said during her daughter’s first year at daycare, she was sick often – with diarrhea, ear infections, etc. – but during her second year, it got better.