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-Location, size, and extent. Located in the Rocky Mountains region of the southwestern US, Arizona ranks 6th in size among the 50 states. The total area of Arizona is 114,000 sq mi (295,260 sq km), of which land takes up 113,508 sq mi (293,986 sq km) and inland water 492 sq mi (1,274 sq km).