From the source, official press release from Nightmare Nights con staff:
 
“Weve recently been contacted by a couple of attendees expressing concern about the Ebola outbreak in Dallas. Were aware that news programs tend to use fear to catch viewers attention, but were not entirely sure what youve been hearing. However, since more than one person has now contacted us regarding this matter, we thought wed take a moment to set the record straight.
 
A person who had come into contact with Ebola victims in Liberia, Africa, falsified his or her travel documents in an effort to catch a flight back to the U.S. He or she has since admitted to lying on those documents to avoid quarantine. He or she was not symptomatic at the time, and Ebola is not contagious prior to symptoms appearing. Several days after arriving in Dallas, the patient began feeling ill, and reported to an area hospital on Friday, September 26th.
 
The patient was been placed in isolationseparate medical staff, separate water supply, and in-room destruction of all materialsat a hospital just over 30 miles from our convention venue, and remains there today. Dallas is a metropolitan area encompassing 9,286 square miles. Its bigger than Rhode Island and Connecticut combined. Trust us, we are well away from this hospital.
 
Heres the most important part: No other cases have presented. Furthermore, Ebola is NOT an airborne virus; it can only be transmitted through vomit, feces, urine, and blood, which is why it had yet to appear in countries with proper sanitation. While we appreciate our attendees concerns, if you can avoid contact with those four things, you cannot possibly contract the disease.
 
We are not altering our plans for Nightmare Nights. Nor has school been cancelled, nor has public transit been altered, nor have any area concerts or sporting events been rescheduled. We know news organizations like to get your attention by talking about epidemicsremember when SARS, bird flu, or swine flu were going to bring the country to a standstill?but everything here is pretty much normal.
 
TL;DR: There is no Ebola outbreak. However, as the patient reported symptoms on September 26th, we will note that Nightmare Nights is exactly 28 Days Later.”