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More in Immunity
What Are the 2 Types of Lupus? SLE vs. Cutaneous
Learn how SLE and cutaneous lupus differ, how they can overlap, and what other forms like drug-induced and neonatal lupus mean for diagnosis.
Is Praline a Tree Nut? What Allergy Sufferers Should Know
Praline almost always contains tree nuts, but the details matter for allergy sufferers. Here’s what to watch for on labels and safer alternatives.
How Long Are You Contagious With Omicron: Full Timeline
Omicron’s contagious window, when you’re most infectious, and how long to isolate—including what to know about asymptomatic cases and Paxlovid rebound.
What Is COVID-19? Symptoms, Causes, and Treatment
Learn how COVID-19 spreads, what symptoms to expect, who’s most at risk, and what treatment and prevention options are available today.
How to Tell If Skin Is Infected or Just Irritated
Learn how to tell apart normal skin irritation from a real infection, including which signs need prompt medical attention.
What Happens If Someone With Celiac Eats Gluten?
When someone with celiac disease eats gluten, the immune system attacks the gut lining. Here’s what that looks like, from immediate symptoms to long-term effects.
How to Get Rid of Oral Allergy Syndrome Symptoms
Oral allergy syndrome symptoms can be managed through cooking, pollen immunotherapy, and a few practical everyday habits.
Are There Lymph Nodes in Your Armpit?
Yes, your armpits hold a cluster of lymph nodes. Learn what they do, why they swell, and when it’s worth checking with a doctor.
Why Does Pus Hurt? The Science Behind the Pain
Pus hurts for several reasons — pressure, nerve-sensitizing chemicals, and bacteria all play a role. Here’s what’s actually happening inside an infection.
What Inflammation Looks Like: Skin, Joints & More
From red, swollen skin to achy joints and blood markers, here’s how inflammation actually appears across different parts of the body.
How Many People Died From the Flu in 2018: 52,000
The 2017-2018 flu season killed an estimated 52,000 Americans. Here’s why it was so deadly and who was most at risk.
How to Prevent CMV: Steps That Actually Work
Learn how CMV spreads and which hygiene habits genuinely reduce your risk, with specific guidance for pregnant women, childcare workers, and transplant recipients.
Can Sleep Apnea Cause Chronic Inflammation?
Sleep apnea does more than disrupt sleep—it can trigger chronic inflammation affecting your blood vessels, brain, and metabolism. Here’s what the research shows.
Is a Date a Tree Nut? What to Know for Allergies
Dates aren’t tree nuts, but allergy concerns are valid. Here’s what the FDA says and what date allergies actually look like.