What are the factors and theories of inheritance and expression of asthma in North America?

Occupation

Allergens

Irritants

Exposure to viral infections

Exercise

Emotions

Aspirin

Humans

Symptoms

Shortness of breath

Chest tightness or pain

Wheezing when exhaling

Trouble sleeping

Coughing attack

Animals

90% children

50% adult

Infant

Transient wheezing

Toddler

Non atopic wheezing

Early childhood

Persistent atopic wheezing

Late childhood

Late onset asthma

Adults

Adult onset asthma

Children

Adults

Teens

Obesity

Inheritance

Mutations

Environmental Factors

ORMDL3

Dogs

Triggers

Symptoms

Coughing

Panting with wide mouth

Wheezing

Cats

Symptoms

Wheezing

Rapid breathing

Coughing/hacking

open-mouthed breathing

vomiting

Squatting position with neck extended

Triggers