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Immunity and infection prevention

Preventing infection

The main article (“Hand hygiene and your home”) gives the basics of protection. This topic brings all the layers of protection together into one system and shows which matters most, and when.

Last updated: ~1 min read
Rings of light around a figure.
Figure 1.Layers of protection around a figure.

01Short answer

Protection from infection is not one rule but a combination of layers. The most important layer is hand hygiene (“Hand and body hygiene”). Then come mouth care (“Mouth and teeth”), safe food and water (“Food, water and infection”), home and surroundings (“Home, hospital and surroundings”), contact with people (“Contacts, family and crowds”), and animals and soil (“Animals, plants and soil”). The medical layer is vaccines (“Vaccines”) and the preventive medicines your doctor prescribes (antibiotic, antiviral, antifungal). The layers are not equally strict at all times: stricter during deep neutropenia and after a transplant, gentler during recovery. The aim is not to stop normal life but to lower risk sensibly.

02Simple explanation

Several layers protect together.

Hand hygiene matters most.

How strict depends on risk.

03Scientific explanation

Evidence-based measures: hand hygiene, preventive medicines and vaccines have the strongest evidence; some older rules (such as very strict diets) are less well supported.

Tailoring: your team adjusts the rules to your level of risk.

04What happens in the body?

Layers of protection

Each layer closes one gap; together they give strong defence.

Preventive medicines

Medicines your doctor prescribes lower specific risks.

A weekly pill organiser on a table.
Figure 2.Preventive medicines in a pill organiser.

A clean home

Ordinary cleaning and fresh air are enough; a sterile home is not needed.

A clean room with an open window.
Figure 3.A clean, airy room — Preventing infection

05Layers of protection

Four steps.

Hands — Hygiene.1HandsHygiene.
Food — Safe food.2FoodSafe food.
People — Sensible distance.3PeopleSensible distance.
Medicines — Prevention and vaccines.4MedicinesPrevention and vaccines.

06Layers and where to read more

LayerTopic
Hand and body hygiene“Hand and body hygiene”
Mouth and teeth“Mouth and teeth”
Food and water“Food, water and infection”
Home and hospital“Home, hospital and surroundings”
Contacts“Contacts, family and crowds”
Animals, soil“Animals, plants and soil”
Vaccines“Vaccines”

07Key terms

Prophylaxis
Protection in advance.
Hand hygiene
Washing hands or using hand rub.
Precautions
Rules that lower risk.
Risk period
The time when protection matters most.
Antiseptic
A product that kills germs.

08Key points

  • Protection has several layers.
  • Hand hygiene matters most.
  • Take your preventive medicines.
  • The rules change with risk.
  • You do not need to stop living normally.
  • With a fever, still call.

09Frequently asked questions

Can I leave the house?

Often yes, while avoiding crowds; ask your team.

Should I wear a mask?

It can help in crowded places and during neutropenia.

When will the restrictions end?

They are relaxed as immunity recovers (“Recovery of immunity”).

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 I leave the house?

  2. Should I wear a mask?

  3. When will the restrictions end?

My questions

12Sources

  1. World Health Organization (WHO). Hand hygiene
  2. American Cancer Society. Infections in People with Cancer
  3. National Cancer Institute (NCI). Infection and Neutropenia during Cancer Treatment
  4. MedlinePlus (U.S. National Library of Medicine). Lymphatic Diseases
  5. National Cancer Institute (NCI). Lymphedema and Cancer
  6. National Cancer Institute (NCI). NCI Dictionary of Cancer Terms: lymphocyte
  7. National Cancer Institute (NCI). NCI Dictionary of Cancer Terms: B cell
  8. National Cancer Institute (NCI). NCI Dictionary of Cancer Terms: T cell
  9. National Cancer Institute (NCI). NCI Dictionary of Cancer Terms: helper T cell
  10. National Cancer Institute (NCI). NCI Dictionary of Cancer Terms: natural killer cell
Medical disclaimerThis information is for educational purposes only and does not replace medical advice.
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