Though in most cases influenza triggers a few days of fever or nausea, the virus ended two lives in recent weeks in Marin County, including a 63-year-old man with chronic ailments who died on Dec. 27 but also a previously-healthy 48-year-old woman who died of complications on Jan. 6, according to the county health department. So far the county reports 83 confirmed cases of flu. H1N1, otherwise known as swine flu, is the most rampant…