Family planning allows people to attain their desired number of children, if any, and to determine the spacing of their pregnancies. It is achieved through use of contraceptive methods and the treatment of infertility.

Contraceptive information and services are fundamental to the health and human rights of all individuals. 

There is a need to prioritize investments in core health system functions that are fundamental to protecting and promoting health and well-being. As a call for action, WHO, in close collaboration with external partners, has developed a knowledge programme on financing common goods for health.

Human immunodeficiency virus (HIV) is an infection that attacks the body’s immune system, specifically the white blood cells called CD4 cells. HIV destroys these CD4 cells, weakening a person’s immunity against infections such as tuberculosis and some cancers.

WHO recommends that every person who may be at risk of HIV should access testing. People diagnosed with HIV should be offered and linked to antiretroviral treatment as soon as possible following diagnosis. If taken consistently, this treatment also prevents HIV transmission to others.

Every person – in every country in the world – should have the opportunity to live a long and healthy life. Yet, the environments in which we live can favour health or be harmful to it. Environments are highly influential on our behaviour and our exposure to health risks (for example air pollution, violence), our access to services (for example, health and social care) and the opportunities that ageing brings. 

Ageing presents both challenges and opportunities. It will increase demand for primary health care and long-term care, require a larger and better trained workforce and intensify the need for physical and social environments to be made more age-friendly. Yet, these investments can enable the many contributions of older people – whether it be within their family, to their local community (e.g. as volunteers or within the formal or informal workforce) or to society more broadly.

WHO supports countries to ensure that their national adolescent health responses are evidence-based and take account of the values and preferences of adolescents. 

Improving the evidence base on adolescent health is crucial. WHO supports countries to improve measurement and  strengthen data, conducts research, and shares best practice. 

Each year, almost half of all pregnancies – 121 million – are unintended, and six out of ten unintended pregnancies end in induced abortion. When an unsafe abortion is carried out to terminate a pregnancy, there can be devastating and long-term physiological, financial, and emotional costs to the woman and her family, as well as to her community at large. 

Each year, almost half of all pregnancies – 121 million – are unintended, and six out of ten unintended pregnancies end in induced abortion. When an unsafe abortion is carried out to terminate a pregnancy, there can be devastating and long-term physiological, financial, and emotional costs to the woman and her family, as well as to her community at large. 

Adolescence is the phase of life between childhood and adulthood, from ages 10 to 19. It is a unique stage of human development and an important time for laying the foundations of good health.

Adolescents experience rapid physical, cognitive and psychosocial growth. This affects how they feel, think, make decisions, and interact with the world around them. 

Alcohol is a toxic and psychoactive substance with dependence producing properties. In many of today’s societies, alcoholic beverages are a routine part of the social landscape for many in the population. This is particularly true for those in social environments with high visibility and societal influence, nationally and internationally, where alcohol frequently accompanies socializing. In this context, it is easy to overlook or discount the health and social damage caused or contributed to by drinking.

Depression is a common mental disorder affecting more than 264 million people worldwide. It is characterized by persistent sadness and a lack of interest or pleasure in previously rewarding or enjoyable activities.  It can also disturb sleep and appetite; tiredness and poor concentration are common. Depression is a leading cause of disability around the world and contributes greatly to the global burden of disease. The effects of depression can be long-lasting or recurrent and can dramatically affect a person’s ability to function and live a rewarding life.

The leishmaniases are a group of diseases caused by protozoan parasites from more than 20 Leishmania species. These parasites are transmitted to humans by the bite of an infected female phlebotomine sandfly, a tiny – 2–3 mm long – insect vector.

There are three main forms of the disease: cutaneous leishmaniasis (CL), visceral leishmaniasis (VL), also known as kala-azar, and mucocutaneous leishmaniasis (MCL). CL is the most common form, VL is the most severe form and MCL is the most disabling form of the disease.

Symptoms may occur within 1 year but can also take as long as 20 years or even more to occur.

Clinical signs are easy to observe. Skin lesion has usually a different pigmentation than the surrounding normal skin (less pigmented, reddish or copper-coloured) and may have various aspects (flat, raised or nodules). Skin lesion can be single or multiple and may show a loss of sensation in the skin.

Skin smears are also used to diagnose leprosy.

People infected with filariasis who have microfilaraemia or a positive antigen test should receive antifilarial drug treatment to eliminate microfilariae. Unfortunately, the medicines available have limited effect on adult worms. Treatment also involves the management of morbidity and disability prevention (MMDP) that includes simple hygiene measures, such as basic skin care and exercise, to prevent acute attacks and progression of lymphoedema to elephantiasis. For management of hydrocoele, surgery may be appropriate.

There is as yet no proven treatment available for Marburg virus disease. However, a range of potential treatments including blood products, immune therapies and drug therapies are currently being evaluated. Supportive care – rehydration with oral or intravenous fluids – and treatment of specific symptoms improves survival.