You have Darkvision up to 60ft.

You have resistance to Necrotic damage. 

Forbiddance. The vampire can’t enter a residence without an invitation from one of the occupants.

Harmed by Running Water. The vampire takes 2d4 acid damage when it ends its turn in running water.

Stake to the Heart. The vampire is destroyed if a piercing weapon made of wood is driven into its heart while it is incapacitated in its resting place.

Sunlight Hypersensitivity. The vampire takes 2d8 radiant damage when it starts its turn in sunlight. While in sunlight, it has disadvantage on attack rolls and ability checks.

As a Vampire Spawn you grow claws and fangs that you may use as natural weapons. 

Your ability scores each increase by 1. Your unholy nature strengthens your physicality, your Strength, Dexterity, and Constitution are increased by 2.

Your age halts at maturity, granting you eternal life.

Humans vary widely in height and build, from barely 5 feet to well over 6 feet tall. Regardless of your position in that range, your size is Medium.

Your base walking speed is 30 feet. Your vampiric claws also grant you a climbing speed of 30ft.

You can speak, read, and write Common and one extra language of your choice. Humans typically learn the languages of other peoples they deal with, including obscure dialects. They are fond of sprinkling their speech with words borrowed from other tongues: Orc curses, Elvish musical expressions, Dwarvish military phrases, and so on.