How come Blade fights vampires all the time and in the rest of marvel universe no one else face them unless he is around?

"Keep your eyes open, they're everywhere"

Where are they right now? How come I haven't seen a random vampire attacking Black Kat on a random Friday night just because the vampire was hungry?

But when Blade is around- Oh lord have mercy, they are all over the place and all kinds!

This is not true. Captain America has fought a vampire, and Blade never showed up. there have been other instances. just that in a majority of them Blade shows up. Just because its in Marvel universe does not mean everything is connected. The majority of Blade's interactions outside of his normal vampire dealings are with mystic characters, street level heroes or villains and shield.

well Dracula is about to take over England....

"How come Blade fights vampires all the time and in the rest of marvel universe no one else face them unless he is around? "Keep your eyes open, they're everywhere" Where are they right now? How come I haven't seen a random vampire attacking Black Kat on a random Friday night just because the vampire was hungry? But when Blade is around- Oh lord have mercy, they are all over the place and all kinds!"

.lol. I think I can answer this fairly confidently... There are many powerful vampires and they do the best they can to keep themselves as hidden as possible from their prey (humans). Also strong vampires have the ability to shape shift and hypnotise humans, so even if a human or superhuman came into contact with a vampire they most likely wouldn't notice. Blade can always locate vampires because he has the rare ability to sense supernatural creatures, so he can tell what type of creature they are and he can even tell if a human has come into contact with a supernatural creature or if the human is possessed by a demon. Also its not that many vampires are not strong enough to take on superheroes, Its simply that its not in their interest to draw attention to themselves. There are many powerful demons and supernatural creatures in the marvel universe that are hardly ever noticed or seen.

 A funny thing is that the Punisher has only come into contact with Blade once and when he did he thought Blade was crazy and making up the existence of Vampires. He also shot Blade in the back and thought that Blade was lying when Blade denied he was wearing any kevlar and said he was a hybrid vampire.

I personally think vampires are awesome because of their variability. I personally think the best vampires are the ones that are less human and more demonic.