The Young Woman Is With Child and Shall Bear a Son and Name Him Emmanuel

This sounds like a clear prediction of jesus in the book of isaiah. In fact, what matthew does with the old testament is far more complicated than our english bibles let on. Isaiah is simply saying to ahaz, hey, h pal, look at the young pregnant woman. She's going to drop a kid really soon. And it's not a prediction. It's an observation. The young woman is with child and shall bear a son and shall name him emmanuel. That's isaiah seven 14.