Following the death of a man in Texas who was infected with Ebola, hospitals across the country are bracing themselves for the possibility of having to manage the deadly disease. Which means a startup called Xenex is particularly busy right now. The Texas-based company created a virus-zapping robot that can effectively stop the spread of the disease by using light to disinfect contaminated rooms. It’s already being used in 250 hospitals across the country and interest in the robots in recent weeks has surged, according to the company.