How many antichrists do we have here today?

1John 2:18Dear children, this is the last hour; and as you have heard that the antichrist is coming, even now many antichrists have come. ...22Who is the liar? It is the man who denies that Jesus is the Christ. Such a man is the antichrist—he denies the Father and the Son. 23No one who denies the Son has the Father; whoever acknowledges the Son has the Father also.