Not colds, rather something like the flu. If we’re talking about me, 2011 or 2012-ish. Maybe 2014. My memory’s a bit hazy.
16 years, including colds.
Moved from General Questions to IMHO.
samclem, moderator.
Depends on how “something like” you mean by “something like the flu”. I’ve only had influenza once, a couple of years ago, and the only thing I’ve ever had that even might be worse than influenza is croup, back when I was a toddler. So if “flu” is the boundary line, then about 35 years. On the other hand, in between, I’ve had two bouts of chickenpox and a number of cases of food poisoning (what’s usually called “24 hour flu”, but which is completely different).
Probably about 7-8 years since I’ve been sick enough to be confined to bed (and bathroom). Got a little cold and sore throat this morning, but nothing to slow me down.
Even when sick, seldom more than 1-2 days.
I had hepatitis A in Chile in 1992, doctor told me to stay in bed for a few weeks. I’ve been up out of bed pursuing more or less normal activities every day since… A couple of mini-strokes and a mild heart attack weren’t diagnosed until I described them to my doctor months later.
I recall getting the flu about 10 years ago. I took a sick day from work. I haven’t been sick since then, nor have I taken a sick day from work since then.
Vaccines are a good thing. 
I get colds about once or twice a year, and feeling less than 100% (e.g. headache) is not uncommon. But the last time I missed any work due to being sick was in late 1988 (though I can’t swear that there haven’t been days since then that I might have missed if I had had work that day, but I don’t remember any days when I was confined-to-bed sick). And the last time I sought medical attention for anything was sometime in the late 1990s (to be tested for strep throat). Knock on wood.
Ten or 11 years between my strep throat and whatever it was I brought back from my trip to the UK & France this past spring that made me lie down on the couch and sleep through most of Memorial Day weekend. Usually, I just pick up a cold on the plane and carry on, sniffling through the last days of my vacation or after I get home. This felt like the flu, but without the congestion; I didn’t want to move or eat for 2 1/2 days and was pretty much out for the following week.
Sick in bed, probably 10 years. I usually have a bad cold in early December, but not really debilitating.
I’ve never gotten anything worse than a cold in my adult life. I got pneumonia when I was about 6, so let’s go with 33 years. I did take one sick day off in that time but that was more because I didn’t want to infect people than because it was debilitating.
God damn. I probably get infectious diseases 3-6 times a year (generally just a cold though). Plus occasionally I’ll have problems like digestive issues or a low blood sugar event which isn’t a contagious disease, but still is pretty miserable.
Lucky bastards. Is only getting sick 0-1 times a year normal for people?
I just had cause to think about this recently. I got some kind of either virulent cold or not-so-virulent flu about a month ago, and boy, did it give me a couple of unpleasant weeks. Still not fully over it.
A close friend commented that it was the first time she’d known me to be sick in over a decade of our friendship. I had to think about how long it had been before that since I’d been sick, and apart from a bout with food poisoning (not by my own food), it was about 18 years’ previous. I got Rubiola (measles) when I was 32. Not fun as an adult.
One of the lucky ones generally, though.
Not needing to see a doctor other than for routine physicals – about 12 years
Not missing work – about 6 or 7 years
Not feeling puny enough to seriously change my plans or day – maybe 3 to 4 years
I don’t think I was sick-in-bed from the time I had an autoimmune flareup at age 12 until the time I had mono at age 20. After that I wasn’t sick in bed again until I started my first office job at age 27 and caught the horrible office flu. Those are definitely the two longest stretches.
It’s age related. Lots of men do very well until their 40s other than accidents then their health gets bad at an accelerating rate and when they reach their 70s, 80s, and 90s they often have lots of problems.
I had a stretch from about 1999 (food poisoning) to 2009 (influenza or something like it) with no sickness in between more serious than the common cold. I did have a fairly bad injury to my leg about 2008 that was about as debilitating as the flu. I’ve only been hospitalized once in my life, for an elective tonsillectomy in 1978.
I’ve never had the flu, i.e. influenza. I’ve had bad colds, often mistaken as the flu. I’ve had awful stomach complaints, sometimes referred to as the stomach flu. I don’t think those are really the flu that is blamed for thousands of deaths, though.
I have had various other illnesses through my life, such as mumps, measles, and gallstones.
So I don’t know how to measure this if colds don’t count. Let’s say five years, maybe longer.
My 30s were a decade I lived without health insurance. My employer wanted to offer health insurance without doing the paperwork, so he paid me what we calculated it would cost in addition to my salary. I spent the money on things other than health insurance.
I never saw a doctor once during that ten years and coincidentally was never sick.
I had a case of Salmonella about 8 years ago that was pretty bad for a week or so. I worked half days the worst 2-3 days and full days after that. By the time it was officially diagnosed I was better. 
The most “fun” part was planning my route home so that I was never more than 5 minutes from a fast food bathroom…