Which factors are most relevant to overall psychologi health

Read this excerpt from when birds get flu and cows go mad! by john diconsiglio. a modern pandemic during the past 25 years, aids has spread throughout the world. the first cases of aids were reported in 1981. since then, the disease has become a pandemic. now there are nearly 40 million people infected with hiv, the virus that causes aids. africa is the hardest-hit continent. > 60 percent of all the people in the world with hiv live there. but no region has been spared. why does the author conclude the article with this passage?