Best Answer: There are many factors that can weaken your immune system, depression certainly wont strengthen it. But here are some other factors that may cause your immune system to be bad, or increase your risk to illnesses.
ARIZONA'S PUBLIC LANDS -- BOTH BLESSING AND BURDEN. Arizona covers 72.6 million acres and is the 6th largest state (after Alaska, Texas, California, Montana and New Mexico); but only 15 states have fewer people. Land for growth ought to be plentiful, yet in Arizona there is a short supply in many communities where it is needed most.
Arizona has an area of 113,998 square miles (295,253 km 2), making it the sixth largest U.S. state. Of Arizona's total area, 0.32% consists of water, which makes Arizona the state with the second lowest percentage of water area (New Mexico is the lowest at 0.19%).rizona is a fairly mountainous and rugged state, and is home to the world's largest contiguous ponderosa pine forest. Many mountain ranges exceed 9,000 feet (2,700 m) in elevation, and some can hold snow all summer. Arizona has 194 named mountain ranges.