Immunity Page 269
More in Immunity
How Long Are You Contagious After Norovirus?
Norovirus spreads longer than most people realize. Learn when you’re contagious, why hand sanitizer falls short, and how to protect others.
How Common Is HIV in the US and Who’s Most at Risk?
Around 1.2 million Americans are living with HIV, but rates vary widely by region, race, and transmission route. Here’s what the data shows.
How Many Strains of Flu Are There? Types A, B, C & D
Flu viruses come in four types, dozens of subtypes, and countless strains. Here’s what sets them apart and how vaccines keep up each year.
How Do You Get Cat Scratch Fever and Who’s at Risk?
Cat scratch fever spreads through a scratch or bite from an infected cat. Learn how the bacteria transfers, who’s most vulnerable, and how to stay safe.
What Are the Signs of Strep Throat in Kids and Adults?
Strep throat symptoms can look different in kids and adults. Learn what to watch for, when to see a doctor, and how quickly antibiotics usually help.
What Are the Symptoms of Yellow Fever by Stage?
Yellow fever progresses through distinct stages, from flu-like symptoms to potentially severe liver and bleeding complications. Here’s what to expect at each phase.
Is Herpes 6 and 7 Sexually Transmitted? The Facts
HHV-6 and HHV-7 spread mainly through saliva, not sex. Here’s what the research actually says about transmission and your real risk.
How to Get Rid of Long COVID: What Actually Works
Long COVID recovery is possible, but it requires the right approach. Learn which strategies actually help with fatigue, brain fog, and other symptoms.
What Reduces Inflammation in the Body, According to Science
Science-backed ways to reduce inflammation, from anti-inflammatory foods and exercise to sleep, stress, and gut health.
How Long Does Flu B Last? A Day-by-Day Timeline
Flu B typically lasts 5–7 days, but cough and fatigue can linger longer. Learn what to expect each day and when to call a doctor.
How Many Types of Flu Are There? All 4 Explained
There are four types of influenza virus, but they’re not all equal. Learn how A, B, C, and D differ and why it matters for your health each flu season.
What Is the Most Common Food Allergy in Kids and Adults?
Milk tops the list for kids, while shellfish is most common in adults. Learn which food allergies people outgrow and how they differ around the world.
How to Get Over a Cold Faster: What Actually Works
Science-backed strategies to shorten your cold, from zinc lozenges and sleep to humidity and hydration — plus what to skip and when to see a doctor.
How to Get Rid of Stomach Worms: Treatments That Work
Intestinal worms are treatable with the right medication. Learn which treatments actually work and how to avoid getting reinfected.