Immunity Page 251
More in Immunity
What Causes Chlamydia Infection? Bacteria and Spread
Learn how the bacterium Chlamydia trachomatis spreads, why most infections go unnoticed, and who should consider regular screening.
Is a Worm a Parasite? Signs, Types & Treatment
Not all worms are parasites, but many are. Learn which ones infect humans, what symptoms they cause, and how they’re treated.
How to Fight COVID Fatigue and Regain Your Energy
COVID fatigue is real and recovery takes a different approach. Learn practical strategies for pacing, sleep, nutrition, and exercise to rebuild your energy.
How to Stop Getting Sick: What Actually Works
Science-backed habits that actually reduce how often you get sick, from sleep and stress to gut health and indoor air quality.
What Are Signs of Inflammation and When to Worry?
Learn to recognize the common signs of inflammation, from redness and swelling to subtler chronic symptoms, and know when it’s time to see a doctor.
What Year Was AIDS Discovered? 1981 and Beyond
AIDS was first recognized in 1981, but the story behind its discovery, naming, and treatment spans decades of science worth knowing.
How to Avoid a Cold: Daily Habits That Protect You
Simple daily habits like handwashing, sleep, and exercise can meaningfully reduce your chances of catching a cold this season.
What Kills Lice Naturally? Methods That Actually Work
Wet combing has the best evidence for killing lice naturally, but oils and heat can help too. Here’s what actually works and what doesn’t.
Is Lyme Disease Curable? The Honest Answer
Most people recover fully from Lyme disease with antibiotics, but delayed treatment and lingering symptoms can complicate the picture.
What Causes Chills When Sick, With or Without Fever
Chills happen when your brain deliberately raises your body temperature to fight infection. Here’s the science behind why, and when to take them seriously.
How Quickly Does Herpes Show Up After Exposure?
Herpes symptoms typically appear 2–12 days after exposure, but timing varies. Learn what early signs feel like and when testing is reliable.
What Does Dewormed Mean for Humans and Pets?
Deworming clears parasitic worm infections in people and pets. Learn how the medications work, which parasites they target, and why pet deworming affects human health too.
How Is Rubella Spread and Who Is at Risk?
Rubella spreads through respiratory droplets and can be contagious before symptoms appear. Learn who remains at risk and how vaccination helps prevent transmission.
How Long Can Meningitis Last? Days to Years
Meningitis duration varies widely by type—from a week for viral cases to months for fungal infections, with some forms lasting years.