The common cold can be described as an infection of the higher reaches of the respiratory tract, or in other words the throat, the nasal passages and the nose. It is interesting to note that there are over two hundred different virus’ that can presently cause the common cold, but the main culprit in adults is the rhinoviruses, of which there are a hundred different strains and are classified as nose virus’.

When an individual becomes affected by a cold, the symptoms usually show up around two days later and these include a sore throat, a runny nose and sneezing. Later symptoms can consist of watery eyes, headache, muscle aches, stuffed nose, and a general feeling of being unwell. The symptoms of a cold can last anywhere from two to seven days but in some cases may even last up to two weeks.

Common Cold

People who have a common cold may find that is accompanied by bronchitis, laryngitis, an ear infection or with those who suffer from asthma, a worsening of the condition. Common cold infections are so prevalent that it is estimated that an adult will suffer between two and five colds each year. Because of this, the condition is the leading cause of people missing work days through illness.

Contrary to belief, colds are actually not very contagious when compared to other infections. Prolonged and close contact is required for the virus to spread and it must get into the nose for there to be infection.

HIV, or human immunodeficiency virus, is the virus which can lead to AIDS. There are many ways to contract this virus, with the most common being through unprotected sex and the sharing of needles.

People who are infected with HIV may initially not realize there is anything wrong with them as they do not show any symptoms. Nevertheless, some people tend to develop some flu like symptoms which can last for several weeks. Some of these symptoms may include fever, tiredness, loss of appetite, aching muscles and joints, rashes and swollen lymph glands.

HIV Virus Structure

When the virus enters the body, it takes residence in white blood cells that are known as CD4 lymphocytes. The virus takes total control of these cells and starts producing billions of replicas of itself every day.

Once infection of HIV occurs, the body starts to attack the virus and because of this the virus cannot make any copies of itself. This in turn leads to a false sense of wellness as although one would still have HIV, the infected person will begin to look and feel better. Unfortunately, during this period the virus is still attacking the lymph nodes, which are the body’s immune system center.

During the course of ten to fifteen years, the HIV manages to kill so many of the CD4 cells that the body no longer has the ability to fight off infections. Once the CD4 cell count drops below a certain number (200 or lower per mL – the average is 600 to 1000) the sufferer is classed as having AIDS (acquired immunodeficiency syndrome). Once a person has AIDS, the risk of infection form almost anything can cause fatal complications.

HIV Virus Cycle

Psoriasis is a skin condition which can start at any age but usually starts after puberty. Skin cells are produced by the body and as new cells are produced the older ones on the outer layer of the skin die and flake off.  This process usually takes between 21 to 28 days, but for someone with psoriasis, the process is accelerated and can occur in as little as six days.  This results in an excess of skin cells building up on the surface of the skin which are then shed easily.  Psoriasis can occur anywhere on the body and appears as red, crumbling patches of skin.  The most common places on the body where psoriasis is found are the scalp, knees, elbows or lower back.

There are many treatments for psoriasis but no cure.  Symptoms can be mild in one person but extremely severe in others and can cause distress.  Psoriasis can be mild at some times and then flare up.  There are different types of psoriasis and most people only have one type at a time but find that one type can develop into another type.  The most common types of psoriasis are plaque psoriasis, nail psoriasis, guttate psoriasis, scalp psoriasis and inverse psoriasis.  There are rarer forms of psoriasis called pustular psoriasis and erythrodermic psoriasis.  Pustular psoriasis causes pus-filled blisters to appear on the skin, while erythrodermic psoriasis causes a rash to appear all over the body and can result in the body losing proteins and fluids.

Psoriasis

There are some factors which can trigger a flare up of psoriasis symptoms such as smoking, stress, alcohol, and some medicines.  There are three types of treatment for psoriasis and these are creams and ointments, lights which the skin can be exposed to and oral or injected medication.