Ella Al-Shamahi meets two women tackling negative or ageist attitudes towards older people around the world.

Alana Officer is leading the World Health Organization Decade of Ageing Well. With a background in podiatric medicine, exercise and public health she's worked on health, disability, rehabilitation and development in West and Central Africa, Europe, South Asia, the Middle East and the Western Pacific.

Lina Walker is vice president of health security in AARP’s Public Policy Institute. (AARP was formerly known as the American Association of Retired Persons.) She has spent nearly 20 years conducting research and publishing on health care and retirement issues.Produced by Jane Thurlow(Image: (L) Lina Walker, credit AARP. (R) Alana Officer, courtesy Alana Officer.)