Virus
Symptom
Immune system
Treat
Protect
Sore
Antibiotics
Invade
Disease
Infections
Bacteria
Digest
To change food in your stomach into substances that your body can use
A disease that is caused by bacteria or viruses
To keep someone or something safe from something dangerous or bad
A medicine that cures infections by destroying bad bacteria
To enter a place in large numbers
An illness
A physical feeling or problem that shows that you have a particular illness
The cells and tissues in the body that make it able to protect itself against infection
Very small living things that can cause disease
A tiny living organism that causes illness or disease
Painful, especially when touched
To give medical care to someone who is sick or hurt