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.

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.

Hepatitis B is a virus that affects the liver. It is more prevalent in Asia and Africa and can be either acute (more common), resolving itself relatively quickly with no long term liver damage, or chronic (in about 20% of cases) lasting six months or more, and sometimes even for life with symptoms coming and going randomly.

Hepatitis B is normally transmitted via contact with infected bodily fluids or blood and only a very small amount of blood is required to transmit the disease because it is that infectious. In the developed world the virus is normally spread via sharing of contaminated needles, unprotected sex and the sharing such things as razor blades. In less developed countries where blood products are not screened properly or medical equipment is not sterilized adequately, this can also lead to the spread of the virus.

Hepatitis B viruses have an incubation period of between six weeks and six months, but approximately one third of all cases show no symptoms of the disease at all. In another third of cases, symptoms appear flu-like in nature and can include aches, pains and weakness; fever; headaches; loss of appetite; jaundice; diarrhea; and, vomiting and nausea. In the last third of cases, the virus can cause severe illness that can last for a long time (many months in some cases).

Vaccines are available nowadays against hepatitis B, but treatment for those infected normally includes nothing more than rest and recuperation. Drug treatments may be required for chronic types of the disease, to prevent damage to the liver and other parts of the body.