Poison ivy and other poison plant rashes canât be spread from person to person. But it is possible to pick up the rash from plant oil that may have stuck to clothing, pets, garden tools, and other items that have come in contact with these plants.
Biological Causes. Some individuals are more vulnerable to depression than others due to their own unique biological factors, such as presence of depression-triggering genes. This means that depression is hereditary; hence it tends to run in families, notes the Black Dog Institute.nother biological trigger of depression is abnormal brain structure and chemistry. The report released by the National Institute for Mental health notes that the brain structure of an individual with depression is slightly different from the rest of individuals who do not have the disorder.
1 Women are twice as likely to have depression, and symptoms of depression, as men of the same age. 2  12% of all women in the United States will experience symptoms of clinical depression at some point in their lives. 3  Approximately one in ten women experience symptoms of depression in the weeks after having a baby.epression rates vary by gender, age, and ethnicity. In general, women are at higher risk of depression than men, ethnic minorities are at greater risk of depression than non-Hispanic whites, and adults aged 45-64 are more likely than any other age group to have a diagnosis of depression.