Night of Something Strange (2016) on Netflix

Teenage friends out for beach week get unexpectedly detoured to a isolated motel where a deadly STD virus now runs rampant, turning those infected into the living dead.

Five teenage friends set out for the beach on their Spring Break vacation. Good times are cut short when one of the group, Carrie, contracts a deadly sexual transmitted disease during a bathroom stop. When they stop for the night at an isolated motel, the real terror begins when the STD virus starts running rampant, turning those infected into the living dead. However, there's more going on at the motel than meets the eye.