I know how you feel, it seems like ages since you last trained once you get sick, but the sickness will pass. Think on the positive; use this time to do other things that you don't typically have time for. For example, when I am sick, I see it as a good time to do more reading or spend more time with my wife (just no kissing, don't want to spread the sickness!).
James 1:16-17 ESV
Do not be deceived, my beloved brothers. Every good gift and every perfect gift is from above, coming down from the Father of lights
With God's help...Mens sana in corpore sano