Is a viral or bacterial infection of the lungs.

Causes inflammation in the lung tissue.

Makes it hard for oxygen in the lungs to reach the bloodstream.

Might lead to children having a cough,

fever, and a hard time breathing.

Is a viral infection that affects the nose,

throat, and lungs.

Also has effects on the rest of the body.

Might cause children to develop a fever, cough, sore throat, runny or stuffy nose,

muscle aches, headaches, or fatigue. 

Is a chronic (long-term) lung disease.

Causes chronic inflammation of the

lower airways.

Can be acute. Children with acute asthma (asthma exacerbation) may cough or feel tightness in their chest, will feel short of breath, and will have reduced air flow. 

Is a viral infection in the small airways

in the lungs - the bronchioles.

Causes the lungs become tight, swollen,

and filled with mucous, making it harder

to breathe.

Is most common in children under 1 year

of age. 

Causes symptoms including a stuffy or runny nose, mild fever, cough, and wheezing. 

Is a viral infection of the breathing

tube below the vocal cords.

Causes the lining of the windpipe to become swollen.

Is most common in children aged 1

to 4 years old.

Causes symptoms including noisy breathing, a bark-like cough, and

a hoarse voice.

Is a viral or bacterial infection of the nasal sinuses.

Causes inflammation of the nasal cavities. 

Causes symptoms including a stuffy or runny

nose, yellow or green discharge, tenderness or pain around the eyes or cheekbones, a feeling

of pressure in the head, and fever.

Are viral or bacterial infections that inflame the back of the throat.

Result in a sore throat.