Researchers in Western Australia are investigating new ways of bolstering the immune system in an effort to fight cancers like mesothelioma. Like most types of cancer, malignant mesothelioma occurs primarily in people over 65. That is also the time in life when the immune system typically weakens. Researchers from Curtin University and the University of Western Australia say it is no coincidence that people become more susceptible to mesothelioma as their immunity wanes. In addition to age-related immune dysfunction, mesothelioma patients experience a further decline in immunity caused by the growing tumor itself. To better understand the connection between declining immunity and the onset of mesothelioma, the researchers are focusing on a particular type of immune system cell called a macrophage….