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More in Immunity
What Causes Chickenpox? Varicella-Zoster Explained
Learn how the varicella-zoster virus causes chickenpox, spreads between people, and why it stays dormant in your body long after recovery.
How Common Is Salmonella? Infections by the Numbers
Salmonella sickens millions each year in the U.S. Here’s a data-driven look at who gets infected, common sources, and why cases stay stubbornly high.
What Is Acquired Immunity and How Does It Work?
Acquired immunity is how your body learns to fight specific threats. Here’s how T cells, B cells, and memory shape your immune response over time.
What Is a Latex Allergy? Causes, Symptoms & Treatment
Latex allergies range from mild skin irritation to serious reactions. Learn what causes them, who’s most at risk, and how to manage daily life with one.
What Is the DTP Vaccine? Diseases, Schedule & Side Effects
The DTP vaccine protects against diphtheria, tetanus, and pertussis. Learn who needs it, when to get boosters, and what side effects to expect.
Is the Flu Deadly? How It Kills and Who’s Most at Risk
The flu kills tens of thousands each year, often in ways people don’t expect. Learn who’s most vulnerable and how vaccination lowers your risk.
What Are Seasonal Allergies? Causes, Symptoms & Triggers
Learn why your immune system overreacts to pollen, what triggers symptoms each season, and practical ways to feel better on high-pollen days.
How Are Colds Spread and When Are You Contagious?
Colds spread through droplets, surfaces, and even before symptoms appear. Learn when you’re most contagious and how to avoid passing it on.
Is the HPV Vaccine Required, Recommended, or Optional?
The HPV vaccine isn’t federally required, but the CDC recommends it for preteens. Here’s where mandates exist, who should get it, and what coverage looks like.
Is Tuberculosis a Virus? It’s Actually a Bacterium
TB is caused by a bacterium, not a virus — and that distinction matters for how it spreads, how it’s treated, and why treatment takes months.
What Is Gluten Sensitivity? Symptoms and Causes
Gluten sensitivity isn’t celiac disease, but it can still cause real symptoms. Learn what triggers it, how it’s diagnosed, and who benefits from going gluten-free.
Why Is Inflammation Bad? Acute vs. Chronic Risks
Acute inflammation helps you heal, but when it turns chronic, it quietly drives heart disease, diabetes, cancer, and aging. Here’s what the science shows.
My Snot Is Green — Do You Really Need Antibiotics?
Green snot doesn’t automatically mean a bacterial infection. Learn what mucus color actually tells you and when you truly need antibiotics.
What Is Tinea Corporis (Ringworm)? Symptoms & Treatment
Ringworm is a common fungal skin infection, not a worm. Learn how to recognize it, treat it, and why some cases now need a doctor’s attention.