By Professor Abraham A. A. Osinubi (Dean, UNILAG School of Postgraduate Studies)
Renowned Scientist • Distinguished Medical Doctor • Esteemed Administrator

Malaria has been one of humanity’s oldest enemies. For centuries, it has threatened lives across Africa, especially among children and pregnant women. Yet, deep within the human body lies an amazing truth: our genes can influence how malaria affects us.

Some people are born with certain genetic traits that give them natural protection against malaria, while others have genes that make them more vulnerable. Understanding this helps individuals, families and communities make wiser health choices.

Which Genotype Protects Against Malaria?

The AS Genotype (Sickle Cell Trait)

People with the AS genotype—meaning they carry one normal gene (A) and one sickle cell gene (S)—have a special advantage:
They are naturally protected against the most severe forms of malaria.

Why?
Because the malaria parasite does not survive well inside their uniquely shaped red blood cells. When the parasite tries to invade AS cells, the cells become sickle-shaped, break down quickly and destroy the parasite inside.

This is why, in areas with high malaria burden, AS is more common—it has been preserved naturally because it helps protect human life.
AC Genotype (Variant Form of Haemoglobin C)

People with AC and CC genotypes also enjoy partial protection against malaria, though not as strong or well-known as AS individuals.

Which Genotypes Are More at Risk?

AA Genotype

People with AA genotype have normal red blood cells that easily allow malaria parasites to grow and multiply. This means:

• They can get malaria more often

• They tend to experience more severe symptoms

This is why AA individuals must be extra vigilant with malaria prevention.

SS Genotype (Sickle Cell Disease)

People with SS genotype face a double challenge.

• Their red blood cells are fragile, causing sickle cell disease

• They are not fully protected from malaria

• Malaria can trigger painful crises and dangerous complications

For SS individuals, prevention is life-saving.

Why This Matters for Families and Communities

Understanding genotype allows families to:

• Make informed marriage and reproductive decisions

• Protect vulnerable members

• Prepare properly for malaria prevention

• Reduce childhood illness and mortality

It also empowers communities to promote early testing, preventive care and education.

The Bigger Picture: A Story of Hope

The relationship between genotype and malaria is not just science—it is a story of human survival, resilience and adaptation. It shows how the human body fights to preserve life, generation after generation.

It reminds us that:
Even in the face of deadly diseases, nature equips us with tools to survive.
Our responsibility is to understand them and use them wisely.

Final Word from Professor Osinubi

“Knowledge is the first medicine. When people understand their genotype, they gain power—power to protect themselves, power to protect their families and power to reduce the burden of malaria in our communities.”
— Professor Abraham A. A. Osinubi