I'm an ovarian cancer survivor but not germ cell related. The first 9 months after treatment I was not up to doing the things I used to do. Since then, I have been slowly getting stronger. Now, at about 1 and a 1/2 years after treatment, I feel as healthy now as before except for peripheral neuropathy in my feet. Chemo drugs can bring down your white blood cells but over time after treatments are over they should build back up for more resistance to colds and infections. Reactions to cancer treatments vary by individual.