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Questions and answers

Is it contagious?

After a diagnosis families often ask: can it pass to the children or to my partner? The short answer is no.

Last updated: ~2 min read
Closeness is safe
Figure 1.Closeness is safe — Is it contagious?

01Short answer

Leukemia is not contagious. It comes from genetic changes in a person’s own blood-forming cells and does not pass to anyone else like a germ. Living together, hugging, kissing and sharing food are safe. The real risk runs the other way: during treatment the immune system is weakened and the patient is vulnerable to other people’s infections. That is why handwashing matters and unwell visitors should stay away.

02Simple explanation

Leukemia cells are the person’s own cells, not a germ from outside.

They cannot live and grow in another person’s body.

So family members need not fear being close.

03Scientific explanation

Leukemia is a clonal disease caused by somatic mutations; no infectious agent is passed on.

Some viruses (for example HTLV-1 in a rare adult T-cell leukemia/lymphoma) can affect risk, but even then the leukemia itself is not transmitted, and this is a rare exception.

04What happens in the body?

Why it does not spread

Infections spread through bacteria, viruses and fungi. Leukemia is an error in the DNA of one’s own cell. Even if such a cell entered someone else’s body, their immune system would destroy it as foreign.

What is safe for the family

Living in one home, hugging, kissing, sharing a table and playing with children are all safe. Closeness gives the patient emotional support.

A protective shield: infections are the danger
Figure 2.A protective shield: infections are the danger

Where the real care is needed

After chemotherapy neutrophils fall and even a common cold can be dangerous. Family members who are unwell should wear a mask, wash their hands and keep their distance if needed. Ask your team for the exact rules.

The family table stays safe
Figure 3.The family table stays safe

05What passes between people

Leukemia and infections behave differently.

In one’s own cells — The change arises in the patient’s own cell.1In one’s own cellsThe change arises in the patient’s own cell.
Cannot pass on — That cell does not move to another person.2Cannot pass onThat cell does not move to another person.
Germs do pass — Colds and flu spread from person to person.3Germs do passColds and flu spread from person to person.
Protect the patient — Hygiene keeps the patient safe from infection.4Protect the patientHygiene keeps the patient safe from infection.
Closeness is safeFamily can be near without fear.
Infection protectionHand hygiene and no unwell visitors.

06Key points at a glance

TopicIn brief
Why it does not spreadInfections spread through bacteria, viruses and fungi. Leukemia is an error in the DNA of one’s own cell. Even if such a cell entered someone else’s body, their immune system would destroy it as foreign.
What is safe for the familyLiving in one home, hugging, kissing, sharing a table and playing with children are all safe. Closeness gives the patient emotional support.
Where the real care is neededAfter chemotherapy neutrophils fall and even a common cold can be dangerous. Family members who are unwell should wear a mask, wash their hands and keep their distance if needed. Ask your team for the exact rules.

07Key terms

Contagious
Able to pass from person to person.
Somatic mutation
A change that arises in a cell during life and is not inherited.
Neutropenia
A low level of the infection-fighting neutrophils.

08Key points

  • Leukemia is not contagious.
  • Hugging and kissing are safe.
  • The patient is vulnerable to others’ infections.
  • Unwell visitors should stay away.

09Frequently asked questions

Can leukemia be passed on through a transfusion?

Donated blood is carefully screened; this route practically does not occur.

Can children be near the patient?

Yes, as long as they are not ill themselves. Ask the team about vaccines.

Is intimacy with a partner safe?

Leukemia does not pass on, but there may be special rules during treatment; talk openly with your doctor.

10Questions for your doctor

Take these questions to your appointment. The ones you save are collected on the “My questions” page and stay on this device only.

  1. Can leukemia be passed on through a transfusion?

  2. Can children be near the patient?

  3. Is intimacy with a partner safe?

My questions

12Sources

  1. National Cancer Institute (NCI). Common Cancer Myths and Misconceptions
  2. National Cancer Institute (NCI). Leukemia—Patient Version
  3. MedlinePlus (U.S. National Library of Medicine). Leukemia
  4. National Cancer Institute (NCI). Infection and Neutropenia during Cancer Treatment
  5. National Cancer Institute (NCI). What Is Cancer?
  6. NHS (UK). Acute myeloid leukaemia
  7. MedlinePlus (U.S. National Library of Medicine). How to Understand Your Lab Results
  8. World Health Organization (WHO). Sepsis — fact sheet
  9. National Cancer Institute (NCI). Survivorship: During and After Treatment
  10. NHS (UK). Acute lymphoblastic leukaemia
Medical disclaimerThis information is for educational purposes only and does not replace medical advice.
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