WHO considers vaccination to be a primary intervention in the Essay

WHO considers vaccination to be a primary intervention in the preventation of disease and promotion of wellbeing - Essay Example Immunology commences as a component of microbiology; in fact, this is a study of infections illnesses to which the human body responds to have a significant role in establishment of immunology (WHO, 2012). Apparently, immunology entails a concept of germ theory, which is related to a disease contributing to the field of immunology. On the other hand, vaccination involves biological measures, which are derived from living organisms (WHO, 2012). In this case, these measures are aimed at enhancing immunity against disease, prevent diseases through prophylactic vaccines, or offer treatment for illnesses through therapeutic vaccines (Hanekom, 2005, 21). These vaccines are in liquid form, which is injected, orally administered or through intranasal routes. Vaccines entail disease causing microorganism or components, which are administered into the human body. 2. Outline three Countries considered high risk for diseases transmission and the approx % persons travelling to these Countries eac h year (using WHO). The economic conditions in developing countries makes a third of the population, which is approximately 1.3 billion to live on low daily incomes that is below the poverty line of one dollar (WHO, 2012). There are other problems involving children malnourishment; in fact a fifth of these children are not immunized after a period of one year. Furthermore, 30% of the world’s population suffers due to inaccessibility to essential treatment (WHO, 2012). Therefore, there are numerous people living below the poverty line and this leads to increased negligence towards dangerous infectious diseases, and due this reason some diseases have gained ground (Pashine, Valiante & Ulmer, 2005, 63). There are nations whose citizens are suffering significantly suffered from consequences of neglecting these diseases (Burton and Murray, 2011, 164). In addition, this problem is aggravated by increasing mass population movement over the years. Some of the countries considered to have a high risk for diseases transmission by WHO include counties in located along the yellow fever belt of Africa and South America. Source: World Health Organization (WHO) WHO (2012) argues that there has been increasing number of planes travelling to and from these places with airline passengers. For instance number of passengers travelling has increased from 2 million since 1950 to over 1.4 billion in the present days among counties in located along the yellow fever belt of Africa and South America (WHO, 2012). Therefore, this makes transmission of illnesses to be in a matter of hours. Numbers of air travel have increased, thereby leading to increased chances of people transporting diseases from continents from one country to the other in few hours. In this case, this poses a threat of deadly diseases to different countries. This has led to recommendations made by World Health Organization (WHO, 2012, 204), indicating that vaccinations are supposed to be administered routinely to infants. In fact, World Health Organization (WHO, 2012, 204) argues that infants, who live in these locations, should be vaccinated and other people who are planning to travel to these countries. These countries have been regarded to be in highly risk situation posed yellow fever due to is viral nature associated with haemorrhagic disease and increased fatality rate. On the other hand, the recognition of the implications of the public health has increasingly dwindled over the years. For instance, there were cases of Ebola reported in 1996, whereby health workers were infected by patients who had visited the country to seek medical services after an outbreak in Gabon. There are initiatives that have been established in South African government

Tides Essay Example | Topics and Well Written Essays - 750 words

Tides - Essay Example (Enchanted Learning, 2008). The ability to accurately predict tides has a variety of important implications, including coastal navigation. (Wikipedia, 2008). Because tides have such important implications, it is important and useful to examine the processes by which changing tides occur. There are two high tides and two low tides every day, with about "12 hours and 25 minutes between the two high tides." (Cooley, 2002). The exact time the high tide occurs depends on the relative location of the moon to earth. The distance between the earth and the moon is a crucial factor in determining tides and tidal range. Two words that are helpful to understand in examining the distance between the earth and moon are "perigee" and "apogee." When the moon is at perigee, or its closest to the earth, the tidal range is increased. When the moon is at apogee, or its farthest distance from the earth, this range is decreased. (Whipple, 2007 & Wikipedia, 2008). The reason that the distance of the earth from the moon has such a profound effect on tidal range is because of gravitational pull. Although the mass of the moon is much less than the mass of the earth, the moon still pulls the earth towards it by means of its gravity. This gravitational pull causes two bulges in the surface of the ocean on opposite sides of the earth, and the spinning of the earth on its axis creates tides as the bulges change location. (Frances, 2005). Because water is always in motion and isn't stuck to the earth, water on the earth is most affected by the moon's gravitational pull. On the side of the earth that is near the moon, water is pulled toward the moon, but on the other side of the earth, there is also a bulge of water. This is because the earth as a whole is being pulled toward the moon by the side that is close to the moon but the water on the other side of the earth is not. (Cooley, 2002). One type of tide is called a spring tide. A spring tide refers to the occurrence of the greatest range in a tide's low and high. In other words, during this tide there will be the greatest distance between how high the water gets and how low the water gets. This happens when there is a syzygy. A syzygy refers to the lining up of the sun, earth, and moon. (Wikipedia, 2008). The reason that the tidal range is greatest during a spring tide is because the gravitational pull of the sun and moon combine to produce the highest highs and lowest lows of the bulging water. (Cooley, 2002). It is also interesting to note that Spring tides occur around the time of new and full moons. (Wikipedia, 2008). When there is a new moon, the moon is in between the sun and the earth. When there is a full moon, the The Proxigean Spring Tide is an especially high tidal range that occurs once about every one and a half years. It happens when the moon is new and is at proxigee. Proxigee refers to when the moon is at its closest perigee to earth. (Cooley, 2002). The opposite of a spring tide is a neap tide. A neap tide refers to the occurrence of the smallest range in a tide's low and high. Neap tides occur when th