Lost battle against Cucumber Mosaic Virus, again!

Uh oh, it is just August 1st and my cucumber plants have already started dying from CMV. This year I planted my cukes in a different box… the one I planted tomatoes in, last year. They survived longer than if I planted in the same box as the one in which I planted them last year (when they got killed by CMV).

I am really tired of this CMV, there is no solution to this problem 🙁 They say prevention is the only thing you can do…but how?