The World Health Organization (WHO) is the United Nations agency responsible for coordinating global health efforts. It works with governments and other partners to ensure that everyone has access to the health services they need.

Trade and investment can have both positive and negative impacts on health outcomes. On the one hand, it can increase access to essential medicines and technologies, and promote economic growth which can lead to improved living standards and health. On the other hand, it can also lead to the spread of infectious diseases, contribute to unhealthy diets and lifestyles, and exacerbate health inequities.

Global health inequities are caused by a complex interplay of factors, including poverty and social inequality, lack of access to essential health services, and weak health systems. Addressing these challenges requires a comprehensive approach that includes economic development, social protection, and investments in health systems.

The WHO's Global Health Strategy focuses on four key components: promoting universal health coverage, addressing the social determinants of health, strengthening health systems, and promoting research and innovation. Promoting trade and investment is not a key component of the strategy.

SDG 3 aims to ensure healthy lives and promote well-being for all at all ages. It includes targets related to reducing maternal and child mortality, ending preventable deaths from non-communicable diseases, and promoting mental health and well-being.

GDP per capita is not a key indicator used to measure progress towards SDG 3. The key indicators are life expectancy at birth, maternal mortality ratio, and under-5 mortality rate.

Civil society organizations play a vital role in global health by advocating for policies that promote health equity, providing essential health services to underserved populations, conducting research on the social determinants of health, and raising awareness of global health issues.

Lack of political will is not a challenge faced by civil society organizations working in global health. The other three options are common challenges faced by these organizations.

The private sector can play a significant role in global health by providing funding for global health initiatives, developing and producing essential medicines and technologies, providing expertise in logistics and supply chain management, and advocating for policies that promote health equity.

Lack of political will is not a challenge faced by the private sector in global health. The other three options are common challenges faced by the private sector in this area.

International law can be used to protect the rights of health workers, ensure access to essential medicines, promote cooperation between countries on health issues, and address global health challenges.

Lack of technical expertise is not a challenge to the effective implementation of international law in global health. The other three options are common challenges faced in this area.

Research plays a vital role in global health by helping us understand the causes of disease, develop new treatments and interventions, evaluate the effectiveness of health programs, and inform policy decisions.

Lack of political will is not a challenge faced by researchers working in global health. The other three options are common challenges faced by these researchers.

Education plays a vital role in global health by helping to improve health literacy, train health workers, promote healthy behaviors, and empower individuals to make informed decisions about their health.