Immunity Page 249
More in Immunity
How Do You Get Smallpox and Why It’s Gone Now
Smallpox spread through close contact and contaminated objects, but its unique biology made it possible to eradicate completely by 1980.
What Temperature Is Considered a Fever?
Learn what temperature counts as a fever, how measurement method affects the number, and when a high temperature needs medical attention.
How Bad Is Tetanus? What the Disease Really Does
Tetanus causes painful, uncontrollable muscle spasms and can be fatal. Here’s what the disease actually does to your body and why it’s still a risk today.
Is 103.5 a High Fever in Adults and Children?
A 103.5°F fever is considered high for both adults and children. Learn what it means, how to reduce it safely, and when to seek medical care.
What Is Measles Disease and Why Is It Dangerous?
Measles is more than a rash. Learn how it spreads, what complications to watch for, and why vaccination remains the best protection.
How Herpes Is Passed, Even Without Visible Sores
Herpes can spread even without visible sores. Learn how transmission actually works, how common it is, and practical ways to reduce your risk.
What Is HPV Vaccination and How Does It Work?
HPV vaccines protect against several cancers by training your immune system before exposure. Learn how they work, who should get them, and what to expect.
How to Bring Your Temperature Down Fast and Safely
Learn safe, effective ways to lower a fever using medication, hydration, and cooling methods, plus signs that mean it’s time to seek medical care.
What Do Tick Bites Look Like? Signs and Rashes
Learn what tick bites and their rashes actually look like, including the Lyme disease bull’s-eye and other signs to watch for after a bite.
What Temperature Is Considered Sick or a Fever?
Fever thresholds vary by how you measure and who you’re measuring. Learn what temperatures actually signal a fever and when to seek care.
What Is Hypersensitivity Disorder? Types & Symptoms
Hypersensitivity disorders occur when your immune system overreacts. Learn about the four types, how they differ from allergies, and what symptoms to watch for.
How to Prevent Monkeypox: Vaccines, Contact & Travel
Learn how mpox spreads and how to protect yourself through vaccination, safe contact practices, and smart travel habits.
Are Cold Sores Always Herpes? Yes, Here’s Why
Cold sores are caused by the herpes simplex virus, but that’s less alarming than it sounds. Learn what that means for your health and how to manage outbreaks.
Is Mustard an Allergen? Facts, Symptoms & Diagnosis
Mustard can cause real allergic reactions, from mild hives to severe responses. Learn the symptoms, hidden food sources, and how it’s diagnosed.