a substance put into person's body to prevent them getting a disease
Vaccination
a medicine or chemical that can destroy harmful bacteria in the body or limit their growth
Antibiotics
Bacteria or viruses have entered the body
Infection
to change food in your stomach into substances that your body can use
Digest
the smallest basic unit of a plant or animal
Cell
Kind type of very small organism that lives in air, earth, water, plants, and animals, often one that causes disease
Bacteria
extremely small piece of organic material that causes disease in humans, animals, and plants
Viruses
the cells and tissues in the body that make it able to protect itself against infection
Immune system
Feeling or physical or mental change that is caused by a particular disease
Symptom
your throat is red and feels painful, especially when you swallow
Sore throat
