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About TASIWA

Giving Warriors a Voice, Giving Families Hope

TASIWA is a Mwanza-based non-governmental organization established in 2016 to promote education and awareness of Sickle Cell Disease (SCD), improve access to comprehensive healthcare, and enhance the quality of life of individuals and families affected by the disease across Tanzania.

Our story

Born from Lived Experience in Mwanza, Driven by Hope for a Sickle Cell-Free Generation

The Tanzania Sicklecell Warriors Organization (TASIWA) is a non-governmental organization based in Mwanza, Tanzania. Founded in 2016 by three women—two mothers of children living with Sickle Cell Disease (SCD) and one Sickle Cell Warrior herself—TASIWA was established out of personal experience, compassion, and a shared commitment to improving the lives of people affected by the disease. The organization was officially registered in August 2019 under Tanzania’s Non-Governmental Organizations Act No. 24 of 2002, Revised Edition 2005, with a mandate to operate across Mainland Tanzania and its headquarters in Mwanza.

TASIWA is committed to improving the quality of life of people living with SCD and their families through education, public awareness, advocacy, prevention, and access to affordable, comprehensive healthcare. Our work focuses on promoting early screening, supporting effective disease management, providing guidance and counselling, strengthening psychosocial support, and empowering patients and caregivers with the knowledge and resources they need. We also work to challenge stigma, discrimination, and misconceptions surrounding SCD while promoting dignity, inclusion, and hope for affected families.

Since its establishment, TASIWA has continued to strengthen its role in SCD advocacy and awareness by mobilizing communities through outreach programmes that integrate education, awareness, and screening. Although these efforts have reached many communities across the Mwanza Region, the need for expanded interventions throughout Tanzania remains significant. Every year, thousands of children are born with SCD in Tanzania, underscoring the urgent need for increased awareness, early diagnosis, and improved access to appropriate care.

At TASIWA, we believe that education is a powerful tool in the fight against Sickle Cell Disease. By equipping individuals, families, and communities with accurate information, promoting informed reproductive decisions, and encouraging early screening and appropriate healthcare, we aim to reduce preventable suffering and contribute to a healthier future for generations to come. Our long-term vision is to break the sickle cell cycle and help build a sickle cell-free generation in Tanzania.

Our vision

To improve the quality of life of people living with sickle cell disease and to break the sickle cell cycle, for the purpose of having a sickle cell free generation in Tanzania.

Our mission

To promote sickle cell awareness and understanding, with the aim of improving patient care, eradicating misconception and social stigma, and supporting patients and families affected by the disease.

What guides us

Our Core Values

Volunteerism

We promote a culture of volunteerism, fostering active participation, teamwork, and a shared commitment to serving communities through freely given time, skills, and resources for the common good.

Human Rights and Dignity

We uphold the inherent rights, dignity, and equality of every individual, ensuring respect, fairness, and ethical conduct in all our work, while promoting a society free from stigma and discrimination against people living with Sickle Cell Disease.

Transparency and Accountability

We uphold the highest standards of transparency, integrity, and accountability by responsibly and efficiently managing the resources entrusted to us, maintaining openness in our operations, and taking responsibility for our decisions and actions.

Culture of Excellence

We strive for excellence, innovation, and continuous improvement by setting ambitious goals, embracing new ideas, and maintaining high standards in everything we do to achieve meaningful and sustainable outcomes for people living with Sickle Cell Disease and their families.

Integrity

We uphold the highest standards of honesty, fairness, and openness in all our dealings, ensuring that our decisions, actions, and relationships reflect strong ethical principles and build trust among the communities we serve, our partners, and stakeholders.

Gender Equality

We promote gender equality by ensuring that women, men, girls, and boys have equal opportunities to participate in, benefit from, and contribute to our programmes and leadership, fostering an inclusive environment where everyone is empowered to reach their full potential.

Our journey

From a Local Initiative to a Regional Movement: TASIWA’s Journey of Impact

Each milestone in TASIWA’s journey reflects the collective strength of Sickle Cell Warriors, parents, healthcare professionals, and partners united by a shared vision: a future where a sickle cell diagnosis never limits hope, dignity, or the opportunity to live a fulfilling life. Together, we continue to break barriers, transform lives, and work towards a sickle cell-free generation in Tanzania.

Read field stories
  1. 2016Establishment of TASIWA | The Tanzania Sicklecell Warriors Organization (TASIWA) was founded in Mwanza, Tanzania, by three women united by their personal experiences with Sickle Cell Disease (SCD) and their commitment to improving the lives of affected individuals and families.
  2. 2019Official Registration | TASIWA was officially registered in Mwanza under the Non-Governmental Organizations Act, with Registration No. 00NGO/R/0435, establishing its mandate to operate across Mainland Tanzania.
  3. 2020–2021Community Outreach and Screening | TASIWA expanded community outreach programmes across Mwanza, combining SCD education and awareness with genotype screening to promote early identification, informed decision-making, and prevention.
  4. 2022Launch of the SCD Daftari Project | With funding from the Bank of Tanzania (BoT), TASIWA implemented the SCD Daftari Project, integrating sickle cell education and awareness messages into exercise books to reach communities, particularly schoolchildren and young people.
  5. 2022–2023Advocacy, Blood Drives, and Peer Support | TASIWA strengthened SCD advocacy through awareness campaigns and blood donation drives in collaboration with partner healthcare facilities. The organization also expanded peer support initiatives for people living with SCD, commonly known as Sickle Cell Warriors, and their caregivers.
  6. 2022–2023Global Genes Health Equity Program | With funding from Global Genes, TASIWA implemented a programme aimed at improving survival rates among children born with Sickle Cell Disease through better care, handling, and disease management in Mwanza Region, Tanzania.
  7. 2025–2026Securing Health, Empowering Lives | Funded by the Bristol Myers Squibb Foundation and implemented under the supervision of Baylor Tanzania, this initiative supports more than 400 children living with SCD in Ilemela and Nyamagana districts to access health insurance, helping reduce financial barriers to essential healthcare.
  8. 2025–2028SCD KETAN Project | Funded by Fondation Pierre Fabre, the KETAN Sickle Cell Project is a Kenya–Tanzania initiative focused on strengthening SCD awareness, early screening, and care. In Tanzania, TASIWA leads interventions across three districts in Geita Region, contributing to the project's target of screening 20,000 newborns and infants.

Leadership

TASIWA’s Leadership Team

Founder and Management

Pascazia Thomas Mazeze

Pascazia Thomas Mazeze

Founder & Executive Director

Pascazia Thomas Mazeze is a holder of LL.M (Economic Law), a lawyer and an Assistant Lecturer at St. Augustine University of Tanzania…

Priscilla Chassama

Priscilla Chassama

Co-Founder & Director of Finance and Administration

Priscilla Vicent Chassama is a Co-Founder of the Tanzania Sickle Cell Warriors Organization (TASIWA), a public health advocate, and a caregiver to…

Livinus Ndibalema

Livinus Ndibalema

Director of Programs

Livinus Ndibalema is a Tanzanian social scientist, public health practitioner, researcher, and programme management professional with over 10 years of experience in…

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