At least 122 people have died from the Ebola virus in the Democratic Republic of the Congo, and officials from the World Health Organization suspect that number is low because of delays in reporting.

Healthcare workers in the area have been having trouble containing the illness from spreading because of violent battles in the region and because residents are distrustful of healthcare workers who have tried to vaccinate them.

Officials say 194 people have been infected with the virus, and 29 more people have been infected since Oct. 2. Healthcare workers are using an experimental vaccine on patients, but they face difficult circumstances as they try to reach those who may have been infected.

[More: Congo's Ebola outbreak to 'get worse before it gets better']

The latest outbreak is in a war-torn region that borders Uganda and Rwanda. Healthcare workers are monitoring the borders and screening people who pass, though WHO officials have said they worry the illness will spread to the neighboring countries.

They have had to suspend their work several times in one of the areas, known as Beni.

Roughly 1 million people who live in the area have been displaced and are still on the move, which makes it difficult for medics to vaccinate people and then monitor them for three weeks, an effective strategy they took earlier this year in another region of the Congo. So far, they have vaccinated 15,828 people.

Ebola can be deadly when it isn't treated, causing diarrhea, bleeding on the body, and damage to the immune system and organs. Various treatments are being tested, but for the most part a patient who is infected receives an IV and is monitored for electrolyte balance and adequate oxygen.