IV drugs are drugs injected directly into the user's vein. Because people who use this type of drug share the same needle and usually with no antiseptic attitude, this type of drug provides a high risk of infection. Contact with body fluids of a person with some kind of infection represents a direct contagion of this infection. Thus, as IV drug users use a single needle, they come into contact with each other's blood and spread the infection.
The conclusion would be; People who have a defect in a specific gene have a predisposition to depression. This mainly is because of the lack in social support.
Every cell in your body has the same genes/DNA but, the gene expression process decides which genes are active in which cells which is how each cell type gets it properties.
In a physical examination, medical examination, or clinical examination, a medical practitioner examines a patient for any possible medical signs or symptoms of a medical condition.