Malaria Prevention: What Actually Works?

Malaria remains one of Ghana’s most persistent public health challenges. Every year, millions of cases are recorded, and thousands of lives are lost, with children under five and pregnant women bearing the heaviest burden. The disease is so common that many people have come to accept it as an unavoidable part of life. That acceptance is dangerous — because malaria is largely preventable.

But prevention only works when it is done properly and consistently. Half-measures fail. A net used occasionally, a puddle drained once, a repellent applied sometimes — these do not stop transmission. What works is a combination of proven measures, applied together and sustained over time.

This Accra Daily Mail article explains what actually works in malaria prevention, based on evidence and the guidance of public health authorities. It is written for ordinary Ghanaians who want to protect themselves and their families with methods that are real, practical, and effective.

Quick Facts

• The most effective malaria prevention tool is the insecticide-treated mosquito net, used every night.

• Indoor residual spraying — applying insecticide to indoor walls — kills mosquitoes that rest after feeding.

• Removing standing water around homes reduces mosquito breeding sites.

• Prompt diagnosis and treatment of malaria cases breaks the chain of transmission.

• Pregnant women and children under five require special preventive measures.

• A combination of methods works better than any single method alone.

• No prevention method is perfect, but consistent use of proven measures dramatically reduces risk.

Why Prevention Matters

Malaria is not a minor illness. It can kill. Even when it does not kill, it causes suffering, keeps children out of school, keeps adults away from work, and drains household finances.

Prevention is cheaper, simpler, and safer than treatment. A mosquito net costs far less than a hospital admission. Clearing a gutter costs less than buying antimalarial drugs. The economics are clear, but the human case is even stronger: prevention spares families the fear of losing a child to a disease that could have been avoided.

The goal of prevention is not to eliminate every mosquito. That is impossible. The goal is to reduce contact between humans and infected mosquitoes enough to stop transmission — or at least to reduce it to levels where severe disease and death become rare.

The Most Effective Tool: Insecticide-Treated Nets

Sleeping under an insecticide-treated net is the single most effective thing an individual can do to prevent malaria. The evidence is overwhelming.

The net works in two ways. First, it is a physical barrier. The mosquito cannot reach you through the mesh. Second, the insecticide kills or repels mosquitoes that come into contact with it. Even if the net has small holes, the insecticide provides additional protection.

The key is consistent use. The net must be used every night, all year round, not just during the rainy season. Anopheles mosquitoes, which transmit malaria, bite at night throughout the year. One unprotected night is enough to get infected.

Nets should be properly hung, tucked in, and checked regularly for tears. A damaged net should be repaired or replaced. Nets lose their insecticide effect over time and should be replaced according to the recommended schedule.

Free or subsidised nets are distributed through Ghana’s National Malaria Control Programme, antenatal clinics, and child welfare clinics. Using them is one of the simplest, most powerful acts of prevention available.

Indoor Residual Spraying

Indoor residual spraying, known as IRS, is another proven method. It involves spraying the inside walls of houses with a long-lasting insecticide.

After a female Anopheles mosquito feeds on a person, she often rests on a wall to digest the blood. If the wall has been sprayed, she picks up the insecticide and dies. Over time, this reduces the mosquito population and interrupts transmission.

IRS is usually done as a community-wide programme, often led by the government or its partners. It is not something individual households can typically do on their own, because it requires specialised equipment and training.

If your community is part of an IRS programme, cooperate with the spraying teams. The insecticide is safe for humans when applied correctly, and the protection it provides is substantial.

Removing Mosquito Breeding Sites

Mosquitoes breed in standing water. The female lays her eggs on or near water, and the larvae develop there before emerging as adult mosquitoes.

Reducing breeding sites is a powerful form of prevention. It means:

• Draining puddles and stagnant water around the home

• Clearing gutters and drains so water flows freely

• Covering water storage containers such as barrels and tanks

• Removing discarded containers, old tyres, and other objects that collect rainwater

• Filling or draining areas where water pools

This is not a one-time activity. Breeding sites reappear after every rain. The effort must be continuous. Community clean-up exercises can help, but household-level action is essential.

The logic is simple: fewer breeding sites mean fewer mosquitoes. Fewer mosquitoes mean fewer bites. Fewer bites mean less malaria.

Personal Protection in the Evening

Because Anopheles mosquitoes bite at night, personal protection in the evening matters.

Wearing long sleeves and long trousers reduces exposed skin. Using mosquito repellent on exposed areas provides additional protection. Ensuring that windows and doors are screened, where possible, keeps mosquitoes out of the house.

These measures are secondary to nets and IRS, but they add value. They are especially useful in the early evening, before people go to bed, when mosquitoes are active and nets are not yet in use.

Prompt Diagnosis and Treatment

This may seem like a treatment measure, not a prevention measure. But it is both.

When a person with malaria is treated promptly and effectively, the parasites in their blood are cleared. That person is less likely to infect a mosquito, which means the chain of transmission is broken.

Delayed treatment, by contrast, allows the person to remain infectious for longer. Each infected person who goes untreated becomes a reservoir from which mosquitoes can pick up the parasite and spread it to others.

Seeking prompt testing and treatment when symptoms appear is therefore a form of community protection, not just self-care.

Special Protection for Vulnerable Groups

Pregnant Women

Malaria in pregnancy is dangerous for both mother and baby. It can cause maternal anaemia, miscarriage, stillbirth, and low birth weight.

Ghana’s malaria control programme provides intermittent preventive treatment for pregnant women. This involves giving antimalarial medicine at scheduled intervals during antenatal care, even if the woman has no symptoms. The medicine clears any parasites that may be present and protects against infection.

Pregnant women should attend antenatal care early and regularly, sleep under nets, and take the preventive treatment as prescribed.

Children Under Five

Young children are at highest risk of severe malaria and death. They have not yet built partial immunity through repeated exposure.

The key protections for children are:

• Sleeping under nets from birth

• Prompt testing and treatment for any fever

• Good nutrition to support the immune system

• Full adherence to vaccination and child health programmes

Some areas in Ghana also implement seasonal malaria chemoprevention, where children receive preventive medicine during the peak transmission season. This is done through health facilities and community programmes.

What Does Not Work (or Works Poorly)

It is worth being clear about what does not work, because many people waste time and money on ineffective measures.

Untreated Nets

A net that is not treated with insecticide provides a physical barrier, but it is far less effective than an insecticide-treated net. Worse, an untreated net with holes offers almost no protection.

Mosquito Coils and Candles

Mosquito coils can repel some mosquitoes, but they are not a substitute for nets and IRS. Their smoke can also irritate the lungs, especially in children.

Herbal Repellents

Some traditional repellents may have some effect, but the evidence is limited. They are not a reliable form of malaria prevention.

Vitamin Supplements

No vitamin or supplement prevents malaria. Good nutrition supports overall health, but it does not stop transmission.

Garlic, Lemon, or Other Food Remedies

There is no credible evidence that eating garlic, lemon, or any other food prevents malaria. These beliefs are common but unfounded.

The message is simple: use proven methods, not rumours.

The Power of Combining Methods

No single method is 100% effective. Nets can tear. IRS coverage may be incomplete. Breeding sites reappear. The most effective approach is to combine methods.

A household that uses treated nets, clears standing water, protects itself in the evening, and seeks prompt treatment is far less likely to experience malaria than a household that relies on one method alone.

This layered approach is what public health experts call integrated vector management. It is the same principle used around the world: multiple barriers, applied consistently, produce the best results.

Common Misconceptions

“Malaria is unavoidable in Ghana”

Malaria is common, but it is not unavoidable. Consistent use of proven prevention measures dramatically reduces risk.

“Nets are only for the rainy season”

Mosquitoes bite all year round. Nets should be used every night, regardless of the season.

“Spraying the room with insecticide is enough”

Household aerosol sprays kill mosquitoes on contact, but the effect is temporary. They are not a substitute for IRS or treated nets.

“If I don’t see mosquitoes, there is no risk”

Anopheles mosquitoes are most active when people are sleeping. You may not see them, but they are there. The absence of visible mosquitoes is not evidence of safety.

“Once I have had malaria, I am immune”

Partial immunity may reduce the severity of future infections, but it does not prevent them. Repeated infections are common.

Frequently Asked Questions

How often should I replace my mosquito net?

Nets lose their insecticide effect over time. The recommended replacement interval depends on the type of net and how it is used. Check with your local health facility or the National Malaria Control Programme for guidance.

Is indoor residual spraying safe for my family?

Yes, when applied by trained personnel according to guidelines. The insecticides used are safe for humans and animals. Ventilate the room after spraying as advised by the spray team.

Can I use a mosquito net for a baby?

Yes. Babies should sleep under nets from birth. Ensure the net is properly secured and tucked in.

What should I do if my net has holes?

Repair the holes immediately. A net with holes can be repaired with a needle and thread or a net repair kit. If the damage is extensive, replace the net.

How can I encourage my family to use nets consistently?

Make net use a nightly routine. Hang the nets before bedtime. Explain the reasons to family members. Lead by example.

What is seasonal malaria chemoprevention?

It is the administration of preventive antimalarial medicine to children in high-transmission areas during the peak season. It is done through health programmes, not self-medication.

Where can I get a free or subsidised net?

Nets are distributed through public health facilities, antenatal clinics, child welfare clinics, and community programmes. Check with your local health centre.

What to Remember

Malaria prevention is not complicated, but it requires consistency. The tools are available: treated nets, indoor residual spraying, removal of breeding sites, personal protection, and prompt treatment. The challenge is not knowledge but practice.

The most important action is the simplest: sleep under an insecticide-treated net every night. Everything else builds on that foundation.

Malaria is preventable. The evidence is clear. The methods work. What remains is the will to use them — every night, every season, every year.

This article is for general information only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified health professional about your individual health needs.

Source: The Accra Daily Mail

Samuel Kwame Boadu

Samuel Kwame Boadu is a Ghanaian media entrepreneur and storyteller with a passion for amplifying urban voices and uncovering everyday truths. He is the Editor-in-Chief and Founder of The Accra Daily Mail, a dynamic digital platform dedicated to capturing the pulse of Ghana’s capital—its people, culture, challenges, business, sports and innovations.