Boy, I could just write the script for how things are going to go between the two of you for the next little while. You will put off addressing the issue because he has a valid excuse for not wanting sex at the moment- the flu. Once he gets over the flu, after about 28.5 hours (LOL)you will become very angry if he chooses to engage in healthy person activities besides sex. He will feel martyred because he will sense your anger and think "Doesn't she know that I've had the flu. How selfish of her." (conveniently forgetting the 4 no-sex weeks prior to the flu). He will also feel chicken-sh*t about approaching you if he does get a bit horny because he will sense your righteous anger and frustration. So, maybe he will jack off instead. Then a couple hours later, utterly fed-up, you will finally approach him for sex and there will be no jelly left in the roll as it were. Then the two of you will "talk" about your sexual relationship using whatever new verbiage you came upon in your newest self-help book. ETC., ETC.Blah, Blech, Blah, Blech, Blah.
I am definitely not getting on your case here for obvious reasons that I can relate only too well. I'm just wondering what you could do that would really be a serious 180 and break the cycle all to h*ll. Maybe, break out the new sex toy in front of him and say "I know you're probably too sick to get it on at the moment but I'm pretty horny and I thought you might want to watch.". If you were feeling really bold you could even include a running stream of consciousness dialogue that revealed the inner fantasy life of Karen in the show.
"Tell me, what is it you plan to do with your one wild and precious life?" - Mary Oliver