27 April 2011 - WHO emphasizes that all travellers (domestic and international) should be up to date with routine vaccinations. Travel is a good opportunity for health care providers to review the immunization status of infants, children, adolescents and adults.

Travellers should be advised to check that they have been fully vaccinated against measles, rubella, mumps, diphtheria, tetanus, pertussis (whooping cough) and poliomyelitis before starting their travel. Non-immunized or incompletely immunized travellers should be offered the routine vaccinations recommended in their national immunization schedules, in addition to those needed for international travel (e.g. yellow fever vaccine).

International travel can pose various risks to health, depending on the characteristics of both the traveller and the travel. Travellers may encounter sudden and significant changes in altitude, humidity, microbes, and temperature, which can result in ill-health. In addition, serious health risks may arise in areas where accommodation is of poor quality, hygiene and sanitation are inadequate, medical services are not well developed and clean water is unavailable.

Health systems financing: the path to universal coverage
Good health is essential to human welfare and to sustained economic and social development. WHO's Member States have set themselves the target of developing their health financing systems to ensure that all people can use health services, while being protected against financial hardship associated with paying for them.

Ultraviolet (UV) radiation is electromagnetic radiation, with wavelengths between 100 and 400 nm. Small amounts of UV radiation are essential for the production of vitamin D in humans, but exposure to large doses may have short- and long-term adverse effects on the skin, the eyes and the immune system.

01 July 2011 -- The Codex Alimentarius is a collection of standards, codes of practice, guidelines and other recommendations related to food safety. The recommendations from this joint Food and Agriculture Organization of the United Nations (FAO) and WHO programme are designed to protect the health of consumers and to ensure fair practices in food trade.