It means susceptibility to violence, and it often implies living in marginal or fragile environments, without access to clean water or sanitation.World Bank: Poverty is pronounced deprivation in well-being, and comprises many dimensions. It includes low incomes and the inability to acquire the basic goods and services necessary for survival with dignity. Poverty also encompasses low levels of health and education, poor access to clean water and sanitation, inadequate physical security, lack of voice, and insufficient capacity and opportunity to better ones life.European Union (EU): The European Unions definition of poverty is significantly different from definitions in other parts of the world, and consequently policy measures introduced to combat poverty in EU countries also differ from measures in other nations. Poverty is measured in relation to the distribution of income in each member country using relative income poverty lines. Relative-income poverty rates in the EU are compiled by the Eurostat, in charge of coordinating, gathering, and disseminating member country statistics using European Union Survey of Income and Living Conditions (EU-SILC) surveys. Measuring poverty
Absolute poverty
Absolute poverty, often synonymous with extreme poverty or abject poverty, refers to a set standard which is consistent over time and between countries. This set standard usually refers to "a condition characterized by severe deprivation of basic human needs, including food, safe drinking water, sanitation facilities, health, shelter, education and information. It depends not only on income but also on access to services."
Respiratory failure results from inadequate gas exchange by the respiratory system, meaning that the arterial oxygen, carbon dioxide, or both cannot be kept at normal levels. A drop in the oxygen carried in the blood is known as hypoxemia; a rise in arterial carbon dioxide levels is called hypercapnia. Respiratory failure is classified as either Type 1 or Type 2, based on whether there is a high carbon dioxide level, and can be acute or chronic. In clinical trials, the definition of respiratory failure usually includes increased respiratory rate, abnormal blood gases (hypoxemia, hypercapnia, or both), and evidence of increased work of breathing. Respiratory failure causes an altered mental status due to ischemia in the brain. The typical partial pressure reference values are oxygen Pa O2 more than 80 mmHg (11 kPa) and carbon dioxide Pa CO2 less than 45 mmHg (6.0 kPa). Cause
Several types of conditions can potentially result in respiratory failure:

Conditions that reduce the flow of air into and out of the lungs, including physical obstruction by foreign bodies or masses and reduced breathing due to drugs or changes to the chest. Conditions that impair the lungs blood supply. These include thromboembolic conditions and conditions that reduce the output of the right heart, such as right heart failure and some myocardial infarctions. Conditions that limit the ability of the lung tissue to exchange oxygen and carbon dioxide between the blood and the air within the lungs. Any disease which can damage the lung tissue can fit into this category.