You are an investigator hired by a large metropolitan hospital in New York. The hospital has just conducted its yearly overview of morbidity and mortality, and has discovered some disturbing trends.
Mortality is up slightly but significantly.
Most ominously, the increase is almost entirely due to a sharp rise in sudden heart failure. Your investigation shows that the deaths over the year have been primarily among the elderly and primarily among women. Most of the victims in the first two months were suffering from infectious disease, primarily AIDS and AIDS-related infections. The deaths in the last ten months show a marked skew towards cancer patients. All were acutely ill with poor prognoses.