Contagion Zombie

Undead Fortitude. If damage reduces the zombie to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the zombie drops to 1 hit point instead.

Waking Disease. Creatures afflicted with Waking Disease from the zombie will have the following effect upon the afflicted. Each hour after affliction, the creature must succeed on a DC 15 Constitution saving throw or gain one level of exhaustion. If a creature dies while afflicted with White Disease, they arise as a Contagion Zombie in 1d4 rounds.

Multiattack. The zombie makes two attacks, only one of which can be a bite attack.

Claw. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) slashing damage. If the target is size Medium or smaller, it must succeed on a DC 11 Acrobatics or Athletics ability check or be grappled. 

Bite. Melee Weapon Attack: +3 to hit, reach 5 ft.,  a creature that is grappled by the zombie, incapacitated, or restrained. Hit: 4 (1d6 + 1) piercing damage plus 3 (1d6) necrotic damage.  If the target is a creature other than a construct or undead, it must succeed on a DC 11 Constitution saving throw or be afflicted with Waking Disease.