Story where many kids were fathered by a virus [duplicate]

Question

I am looking for a story which I read probably two decades ago, in the 90s, but which was probably already old at that point. I think I read it in some kind of anthology, in English, and in the USA.

A substantial number of children, all across the world, are the result of some kind of virus which caused infected women to become pregnant. The resulting children are either clones of the virus's creator, or else his DNA acts as the father's and mixes with the mother's in the normal way—I don't remember which.

The children who resulted are identifiable by their appearance. The story follows one such child in school (middle or high school, I'd say). Being one of these children is an embarrassment and makes him an outcast from the normal children.

I believe a band of these "siblings" comes together and end up finding the creator of the virus.

Answer 1

This is almost certainly The Cuckoo's Boys by Robert Reed first published in 1998. As per this answer:

In the near-future title story, a lonely genius clones himself -- not once, but millions of times -- by creating a virus that affects pregnant women. Throughout the world, women give birth to baby boys with the genetics of Phillip Stevens. Then a few years later, a man with a mysterious past becomes a mentor to three of these clones -- and as their teacher, he tests and challenges them. Are these boys little more than genetic copies of Stevens? Or are they distinct individuals, with unique personalities and coming-of-age problems?