Immunity Page 284
More in Immunity
Is Thrush a Bacterial Infection? Causes Explained
Thrush is often mistaken for a bacterial infection, but it’s actually caused by a fungus. Learn why the difference matters for treatment.
Is Chicken Pox Still Around? What You Need to Know
Chickenpox still exists, and even vaccinated people can catch it. Here’s what parents and adults should know about the virus today.
What’s in Allergy Shots? Ingredients Explained
Allergy shots contain small amounts of what triggers your symptoms, plus a few inactive ingredients. Here’s what’s in them and how they work.
Is Celery High in Histamine? Symptoms & Diet Tips
Celery is generally low in histamine, but it can still trigger symptoms for some people. Here’s what to know before adding it to your diet.
Is Varivax a Live Vaccine? Side Effects and Who to Avoid
Varivax is a live-attenuated chickenpox vaccine. Learn who should avoid it, what side effects to expect, and why timing and storage matter.
How to Relieve a Fever: Meds, Fluids, and Cooling
Learn practical ways to manage a fever at home, from medications and fluids to cooling methods, plus when to see a doctor.
What Is a Sulfa Allergy? Symptoms and Drugs to Avoid
Sulfa allergies affect certain antibiotics and other medications. Learn which drugs to avoid, what symptoms to watch for, and how it differs from sulfite sensitivity.
What Are Norovirus Symptoms and How Long Do They Last?
Norovirus symptoms come on quickly and can knock you out for days. Here’s what to expect, how long it lasts, and when you stop being contagious.
How Bad Is Influenza B? Symptoms, Risks & Recovery
Influenza B can be just as serious as influenza A, especially for kids. Here’s what to expect from symptoms, recovery, and when to watch for complications.
How Common Is Chagas Disease? Global and US Numbers
Chagas disease affects millions worldwide, including hundreds of thousands in the US. Learn who’s at risk and why most cases go undetected.
Is 102.1 a High Fever? Adults, Kids, and When to Worry
A 102.1°F fever is mild to moderate for most adults but needs closer watch in young children. Here’s what to do and when to call a doctor.
How to Prevent Dengue Fever at Home and While Traveling
Practical steps to reduce your dengue risk at home and abroad, from removing standing water to choosing the right repellent for travel.
What Is the COVID Vaccine and How Does It Work?
Learn how COVID vaccines work, what’s in them, and why they were developed quickly without cutting corners on safety.
How Long Does Fatigue Last? A Timeline by Cause
Fatigue timelines vary widely depending on the cause. Here’s how long tiredness typically lasts after illness, poor sleep, surgery, or nutrient deficiencies.