Thalassaemia screening in Malaysia: who gets free tests, and what a carrier result means

What is thalassaemia?

Thalassaemia is a group of inherited conditions in which the body makes too little normal haemoglobin, the protein in red blood cells that carries oxygen. The main types in Malaysia are alpha thalassaemia, beta thalassaemia and haemoglobin E (HbE), which can combine with beta thalassaemia.

There is a big difference between carrying the gene and having the disease:

• Carrier (thalassaemia trait or minor): one altered gene. Carriers are healthy, may have slightly small red blood cells or mild anaemia, and need no treatment. Most don’t know they are carriers.
• Thalassaemia major and other severe forms: two altered genes. Severe forms need blood transfusions every few weeks for life, plus daily medicine to remove the extra iron that transfusions build up in the body. Milder forms may need transfusions only sometimes.

Malaysia’s Ministry of Health now groups patients by whether they depend on regular transfusions (transfusion-dependent thalassaemia) or not.

How common is it in Malaysia?

Thalassaemia is one of the most common inherited conditions in Malaysia. Between 2017 and 2020, 924,487 Form 4 students were screened, and 53,559 (5.8%) were carriers, about 1 in 17. Rates differ between states and communities. In February 2026, the Health Minister told Parliament that carrier rates were highest in Sabah, Selangor and Kedah.

The Malaysian Thalassaemia Registry’s 2023 report lists 9,554 patients treated in public hospitals. Lifelong treatment is expensive: the Health Ministry estimates about RM3 million per patient from infancy to age 40.

Screening is working. New thalassaemia births fell by about half between 2009 and 2021, and the national programme aims to cut them by up to 75% by 2030.

How thalassaemia is passed on

Everyone has two copies of the genes involved, one from each parent. When both parents are carriers of the same type, each pregnancy has:

These chances are the same for every pregnancy. Having one affected child doesn’t make the next one safer. When only one parent is a carrier, each child has a 1 in 2 chance of being a carrier, but not of having a severe form from those genes.

This is why screening matters most for couples planning to marry or have children, and for the family of anyone found to be a carrier.

What Budget 2027 changes

Budget 2027, tabled on 9 October 2026, extends free thalassaemia screening by the Ministry of Health to husbands and children in at-risk carrier families, to reduce the number of babies born with thalassaemia major.

In practice, this means that if a woman is found to be a carrier, for example during pregnancy, her husband and children can be screened for free. The government has not yet announced a start date or how families will be called for screening. Ask at your Klinik Kesihatan if you think your family qualifies.

Who is screened for free

• Form 4 students: the national school programme has offered free screening since 2016, with parents’ written consent. Each student gets a Thalassaemia Screening Card showing their result.
• Pregnant women: screened as part of antenatal care at government clinics since 2009.
• Relatives of carriers and patients: parents, brothers, sisters and children (known as cascade screening).
• From 2027: husbands and children in at-risk carrier families, under Budget 2027.
• Anyone who asks: government health clinics also offer voluntary screening, including for couples planning to marry. Premarital thalassaemia screening is voluntary in Malaysia, unlike HIV screening for Muslim couples.

Keep your screening card or result safely. You only need to be screened once, as your genes don’t change.

How the test works

1. Full blood count (FBC): a routine blood test. Thalassaemia is suspected if your red blood cells are small, with an MCV below 80 fL or an MCH below 27 pg.
2. Haemoglobin analysis: a laboratory test (HPLC or capillary electrophoresis) that identifies beta thalassaemia, HbE and some other types.
3. DNA analysis: done when needed, mainly to confirm alpha thalassaemia, which a haemoglobin analysis can miss.

You don’t usually need to fast. Some types, including mild alpha thalassaemia and HbE, can show normal red cell sizes, so a normal FBC doesn’t always rule out being a carrier. If thalassaemia runs in your family, tell the doctor.

Thalassaemia trait or iron deficiency?

Both thalassaemia trait and iron deficiency cause small red blood cells, and both are common in Malaysia, so they are easily confused. A doctor can tell them apart with an iron test (ferritin) and a haemoglobin analysis.

• Don’t start iron tablets just because a blood test shows small red cells or mild anaemia. Iron doesn’t help thalassaemia trait, and extra iron can build up over time.
• Severe iron deficiency can hide beta thalassaemia trait on the haemoglobin analysis. Your doctor may treat the iron deficiency first and repeat the test, although couples at risk should still be fully tested.

If you or your partner is a carrier

• You are healthy. Being a carrier doesn’t turn into thalassaemia major, and you don’t need treatment.
• Tell your family. Your parents, brothers, sisters and children may also be carriers and can be screened.
• Test your partner before or early in pregnancy. If only one of you is a carrier, your children cannot have a severe form from those genes.
• If you are both carriers, ask for genetic counselling. A counsellor will explain your options without pressure. These include testing a pregnancy early by chorionic villus sampling (CVS) or amniocentesis, which carry a small risk of miscarriage, or IVF with genetic testing of embryos before pregnancy. Some of the DNA tests are done by private laboratories, so ask about costs.

Where to get screened in Kuala Lumpur

Klinik Kesihatan (government health clinics) offer free walk-in, voluntary and family screening. Bring your MyKad, and if you are a relative of a carrier, their screening card or result.

Private GP clinics can do a full blood count and send blood for haemoglobin analysis at a private laboratory, for a fee. Children with thalassaemia in Kuala Lumpur are treated at government hospitals, including Hospital Tunku Azizah, which also offers stem cell transplants, the only established cure.

Find a clinic for a blood test

Any GP clinic can do a full blood count and arrange further tests if your red blood cells are small. Our directory lists GP clinics across Kuala Lumpur, Selangor and other states, with opening hours and directions.

Browse the clinic directory

Frequently asked questions