First of all we should try and explain what influenza (flu) is. There are three main types: A, B and C, with B and C only infecting humans and influenza A being able to infect humans, animals and birds. The surface of each influenza A virus contains two types of protein, neuraminidase (N), of which there are nine types, and haemagglutinin (H), of which there are sixteen types. Consequently, there are lots of sub-strains of the influenza A virus and they are given names depending on the type of proteins found on the surface. Examples of these sub-strains could be H1N1, H1N2 and H2N3.

Another characteristic of the A strain is that it has the ability to produce new strains – in other words, mutate. It is as these new strains occur that new types of flu are discovered.

Bird flu is a strain of influenza A that affects birds, of which all species can be affected. Whereas wild birds can carry the disease when they migrate, they don’t usually become ill with it whereas poultry birds like turkeys and chickens do become ill. The virus spreads easily between these birds.

Bird Flu

It is the H5N1 virus that is causing all the problems with humans at the moment. This strain has affected birds for almost half a century, but it mutated back in 1997 in the Far East and spread to humans. As of yet this strain of the virus cannot be transferred from human to human, only from bird to bird or sometime bird to human.

Influenza can be defined as a viral disease that once contracted can last from between three to five days. Influenza is normally accompanied by aching joints and muscles, cough, headaches and fever, and sufferers normally go through a period of two to three weeks feeling fatigued. The disease can become serious, leading to such conditions as pneumonia, brain and nerve damage and sometimes even death, but occurrences of these serious conditions are rare.

Other symptoms can occur with influenza and these can include chest pain, loss of appetite, restless sleep, chills, indigestion, and vomiting. Individuals that catch influenza should drink as much fluid as they can due to the fever, rest while trying to get lots of sleep, and avoid smoking or drinking alcohol. A person should contact their doctor should the symptoms still be present after a week, or if they are feeling worse than they were.

Influenza

Influenza is spread from individual to individual through the air, infecting the throat, nose or lungs once contracted. As it can spread very quickly, epidemics often occur with affected areas in the grip of the virus from four to six weeks.

The elderly are particularly at risk from the disease, while individuals with lung or heart disease can develop complications if struck by flu. The people who are most at risk are advised to seek yearly vaccinations.

Nearly everybody alive goes through a state of feeling sad, or what we normally call depressed, but this usually goes away after a time. Individuals that happen to have a depressive disorder, or what we know as clinical depression, tend to find that this interferes with their daily lives and routines.

Depression in Men

To give depression an official description, the MediLexicon’s Medical Dictionary states that: depression is “a mental state or chronic mental disorder characterized by feelings of sadness, loneliness, despair, low self-esteem, and self-reproach; accompanying signs include psychomotor retardation (or less frequently agitation), withdrawal from social contact, and vegetative states such as loss of appetite and insomnia.”

Depression in Women

There are many types of depressive disorders and these include dysthymic disorder, major depressive disorder, psychotic depression, postpartum depression (which is normally referred to as postnatal depression), SAD (seasonal affective disorder) and bipolar disorder.

The symptoms and signs of depression are not clear-cut at all. Some symptoms that may be experienced by some individuals may not be had by others. Also, the severity of the illness all depends on the individual concerned and the type of depression they may have. Nevertheless, common symptoms experienced by sufferers of depression include the feeling of pessimism, sadness or anxiety; feelings of hopelessness, restlessness and irritability; loss of interest in pursuits, activities and sex, among other things; fatigue, loss of concentration and disturbed sleep; aches and pains, change of eating habits and sometimes even suicidal thoughts.

Depression and Heart Diseases