A man who had recently returned from traveling to Liberia died on Monday in New Jersey of a rare African virus called Lassa fever.

As reported in Time, the virus, which can sometimes be fatal but is nowhere as dangerous as the Ebola virus, causes the victim to suffer hemorrhagic symptoms. In comparison with Ebola, Lassa fever is fatal in 1 percent of those who are infected, while Ebola can be fatal for 70 percent of those who are infected and go on untreated.

Aside from this statistical point, Lassa fever is also far less communicable than Ebola and is typically contracted from rodent feces. The disease does however affect a significant amount of the population in Africa as around 100,000 to 300,000 Lassa fever cases are reported in West Africa each year, a number which leds to 5,000 deaths annually, according to the CDC.

According to officials, the deceased victim of Lassa fever arrived at JFK airport from Liberia on May 17, and then went to a hospital the following day complaining of fever, a sore throat, and feeling of fatigue.

He was discharged, but on May 21 his symptoms worsened and he returned to the hospital. At this point he was transferred to a facility equipped to deal with the viral hemorrhagic fever he was suffering from.

The patient, who had been placed in proper isolation, died Monday evening.

According to the Associated Press, officials at the Center for Disease Control did not give out the name of the virus victim or offer any identifying information. They did say that he had traveled to Liberia on business often and had worked in the mining industry.

The CDC has put together a list of individuals who may have encountered the patient while he was ill. These people will be monitored for 21 days in order to see if they develop the Lassa fever.