Absolutely be proactive with protecting your body. But a stress test is pretty worthless as far as that goes. A test that hardly anybody should have. You might want to look into the data regarding the "various medical tests, vaccines, etc. that are out there."

Shingles vaccine has pretty limited utility as well.
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Gotta agree on the stress test. I've had three and anyone who runs it's kind of a joke. With my first one after several min the doc asked how I felt, my reply doc if you give me food and water I could run at this pace for 6 hrs...he said turn it off.

As for the shingles vaccine I got it hoping if I do get shingles it will be a milder case.