I've had some incredible success asking about golden age sci-fi stories here, so I figure I'll try another one. It was one of those stories without a real main character, just posing a change in humanity and the resultant changes in society. A virus sweeps through humanity and in the wake of it, people find that a gene has been turned on that causes them to develop thick fur on most of their skin surfaces rather than the usual light dusting on head and groin. One of the aspects that sticks out to me was that there's a brief flirtation with mass nudism since clothing is useless (and uncomfortable) before humanity realizes they've become addicted to having pockets, and instead move to most people wearing a brief set of shorts (no idea why they didn't just go with fanny packs like most nudist colonies). I think that the story began by establishing its premise, that humanity's relative lack of hair was all due to a prior virus having turned that gene off en masse with a bit of an implication that it was part of what drove us to become intelligent since we had to compensate for our exposed skin.
As with prior requests, I read it in the library somewhere before 1998, probably before 1991, but there's a good chance that it's older. I read a lot of anthologies growing up.