
Chapter 1
Meet the microscopic hijackers
Chapter 2
Why winter is virus prime time
Chapter 3
Your body's brilliant defenses
Chapter 4
The shape-shifters and the missing cure
YOUR GOAL
Master of Inside the microscopic battle for your nose
Ch 3 · Your body's brilliant defenses

doctorx Viral irritation in the throat and lungs triggers a sudden burst of air that clears out excess mucus.
Fun Fact
Fever power: Raising body temperature by just one degree Celsius increases the production and speed of white blood cells.
Glossary
fever (noun)
An abnormally high body temperature, typically occurring as a symptom of disease or infection. Elevating body temperature above 37 degrees Celsius helps the body inhibit the replication of invading influenza viruses.
An abnormally high body temperature, typically occurring as a symptom of disease or infection. Elevating body temperature above 37 degrees Celsius helps the body inhibit the replication of invading influenza viruses.
Quiz
How much mucus does a healthy human body produce every single day to trap foreign invaders?
Quiz
Which immune cells work faster and more efficiently when your body temperature rises during a fever?
Quiz
What is the primary job of the tiny, hair-like cilia lining your respiratory tract?
Quiz
What proteins are found in mucus that actively bind to and neutralize invading viruses?
Quiz
Which brain region acts as the body's thermostat, raising the temperature setting when a virus is detected?
