The H1N1 virus has claimed the life of the third Clark County resident in a month.
The 47-year-old man killed by the so-called swine flu had underlying medical conditions, the Southern Nevada Health District reported.
The health district declined to release the victim's name or other information about him or the circumstances of his death.
With a previous H1N1 death of a woman who lived in another state but died in Las Vegas, Southern Nevada has seen four deaths from the virus and 145 other confirmed cases as of Friday.
The rest of Nevada has not had an H1N1 death, according to the health district.
Three of the 145 confirmed Southern Nevada cases are patients currently hospitalized with severe illness.
The health district only keeps track of people hospitalized with H1N1, and no longer requires doctors to report patients who have it but are not hospitalized.
Health district spokeswoman Stephanie Bethel said health officials do not plan to release any public alerts about the latest death related to the virus.
"It's an influenza. It's still behaving the same as the seasonal flu," Bethel said.
She said there's no way to predict how many more H1N1 deaths the county will see over the next year.
Bethel said 30,000 people die each year in the United States from influenza-related illnesses.
She urged people to continue taking daily precautions to keep from contracting and to minimize the spread of H1N1:
• Wash hands regularly
• Avoid contact with sick people
• Cover your nose and mouth with a tissue when you cough or sneeze
Symptoms of the H1N1 virus resemble those of other strains of influenza, including fever, cough, sore throat, body aches, headache, chills and fatigue. Some people have reported diarrhea and vomiting associated with swine flu.
The health district encourages anyone experiencing such symptoms to seek medical attention.
The district predicts more localized outbreaks will continue to occur through the summer but most cases of the H1N1 virus are mild and treatable.
In June, a 33-year-old Clark County man died of the flu, but had no other underlying health issues prior to his death. He was never identified.
Weeks before that death, a 70-year-old New York woman also died of H1N1 virus after she arrived in Las Vegas. She was never identified.
The most recent death tied to H1N1 was Brantley George Gruber, 51, who died July 3 of leukemia but doctors discovered he had the virus as well.
Contact reporter Maggie Lillis at email@example.com or 702-383-0279.