[mikeodds]

Also a chest X-ray to check for TB, a lazy question to the crowd - could that not also be performed via blood test?

[zie]

It's not that simple, Once you have been exposed to TB, you will always test positive. A chest X-ray is the only way to know if the TB is active or not(that I'm aware of currently). Source: I'm one of those that always test positive to TB tests.