I find just basic contact is also lacking, the only people I see (apart from my wife and kid) are usually taking my money in exchange for goods or services. I do have some old school friends but I don't get to see them much these days.
My little girl has brought home some pretty nasty bugs from child care and my immune system isn't always up to fighting them off. Probably another side effect of not working in an employed job for over 10 years.