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.
The desert botanical garden in Phoenix city of Arizona displays a large collection of beautiful arid-land plants. The 140 acre garden has more than 21000 desert plants from 139 different species. This garden is renowned for its collection of 169 rare species of desert plants.