Getting sick a lot

I have completed chemotherapy and radiation almost 2 years ago.

Lately I have been getting sick left and right with all kinds of minor illnesses, such as cold , ear infection etc.. it seems to be a constant thing.  I do admit I do have a toddler that just started preschool .  Has anyone else experience this?  It just seems once I feel better I get sick again.  Has my immune system been compromised from chemo?

Looking forward to hearing feedback