DENVER -- A 25-year-old Commerce City man has died as a result of the H1N1 swine flu, the Adams County Coroner's Office confirmed Monday.

The unidentified man died on Sept. 29 after receiving treatment for an upper respiratory illness, Coroner James Hibbard said.

At the time he was treated, the man didn't exhibit, or complain, of any flu-like conditions.

Hibbard said the man had complained to his doctor about a sinus problem but wasn't showing any typical flu symptoms such as a high fever, cough, vomiting or diarrhea. Hibbard said the man was obese, but it's unclear if that played any role in his death. The man was not known to have other pre-existing conditions.

Previous to his death, there were six confirmed deaths in Colorado from the H1N1 flu. Three of the six were 18 or younger. The remaining three were 25 or older.

The 2009 H1N1 vaccine is expected to arrive in Colorado beginning this week.