A few nice health images I found:

Health

Image by 401(K) 2013
Health insurance fund

I am the designer for 401kcalculator.org. I have put all these images in the public domain and welcome anyone to use them however please credit our site as the source if you do: 401kcalculator.org

Health

Image by Tax Credits
Health

We have made this image available for anyone to use. Please credit our site TaxCredits.net as the source if you do.

Health

Image by GotCredit
Health Keyboard Button

Feel free to use this photo on your site, all I ask is that you credit my website www.gotcredit.com as the source.

Example: [Photo credit: Got Credit]