The intrinsic layer of the PIN diode is a layer without doping, and as a result this increases the size of the depletion region - the region between the P and N layers where there are no majority carriers. This change in the structure gives the PIN diode its unique properties.
Be aware of possible complications. By weakening your immune system, HIV can leave you vulnerable to certain cancers and infections. These infections are called opportunistic because they take the opportunity to attack you when your immune system is weak.
1 No cure is available for some STDs like HIV or chronic hepatitis B infection, but medications are available to manage these chronic conditions. 2  Complications of STDs depend upon the specific type of illness, but pelvic inflammatory disease and infertility are complications of some STDs.