Immunity Page 258
More in Immunity
Is a Cold Sore a Form of Herpes? HSV-1 Explained
Cold sores are caused by HSV-1, a form of herpes most adults carry. Learn how the virus works, what triggers outbreaks, and how to manage them.
What Does a Normal Tick Bite Look Like vs. Lyme?
Learn how to tell a normal tick bite apart from a Lyme disease rash, and what symptoms to watch for in the days and weeks after.
How Long Do Body Aches Last With a Cold?
Cold body aches usually peak in the first day or two and ease within a week. Here’s what’s causing them and how to feel better sooner.
How to Know If You Have Food Poisoning
Learn how to tell food poisoning apart from a stomach bug, when to see a doctor, and which symptoms mean you need care right away.
Why Am I Getting Hives All of a Sudden?
Sudden hives can be triggered by stress, foods, or things you’d never expect. Learn what’s causing yours and how to find relief.
Why Am I Getting Skin Allergies All of a Sudden?
Sudden skin allergies in adults can stem from stress, hormonal shifts, or a weakened skin barrier. Here’s what might be behind your reaction.
How to Get Over a Head Cold Fast: What Actually Works
From zinc lozenges to saline rinses, here’s what the evidence actually says about recovering from a head cold faster.
How Many Doses of HPV Vaccine Are Needed: By Age
The number of HPV vaccine doses you need depends on your age. Learn whether you need one, two, or three doses and what to do if you’ve missed one.
What to Do If You Break Out in Hives: Relief Tips
Broken out in hives? Learn how to calm the itch, choose the right antihistamine, spot your triggers, and know when to seek medical help.
How Long Does Food Poisoning Take to Make You Sick?
Food poisoning can strike in as little as 30 minutes or take several days to appear, depending on the pathogen involved and your personal health factors.
How to Know If You Have a Brain-Eating Amoeba Infection
Learn the symptoms of brain-eating amoeba infection, how it’s diagnosed, and what to do if you’ve had recent freshwater exposure.
How Can You Tell If You Have HIV: Symptoms & Tests
Learn what HIV symptoms to watch for, when they appear, and which tests can confirm your status — including options for testing at home or in a clinic.
Lump in Your Armpit: Causes and When to Worry
Most armpit lumps are harmless, but some need medical attention. Learn the common causes and which signs are worth checking out with a doctor.
How Do I Know If I Have Inflammation in My Body?
Inflammation shows up in more ways than redness and swelling. Learn how fatigue, brain fog, and gut issues can all be signs, and which blood tests to ask about.