Infections & Seasonal Complaints

Colds, flu, and common seasonal illnesses -- explained simply.

19 articles

Vaccinations: What Adults and Parents Need to Know

Vaccination schedules don't end after childhood — several vaccines are specifically recommended at defined points throughout adult life, and understanding the logic behind each one helps make sense of a schedule that's easy to lose track of.

Pneumonia: Symptoms, Risk Factors and Recovery

Infections & Seasonal Complaints

7 min read

Pneumonia: Symptoms, Risk Factors and Recovery

Pneumonia ranges from a manageable illness treated at home to a serious, life-threatening infection — and knowing which warning signs separate the two categories matters more than memorizing every possible symptom.

Chronic Cough: Common Causes and When to See a Doctor

Infections & Seasonal Complaints

6 min read

Chronic Cough: Common Causes and When to See a Doctor

A cough lasting more than eight weeks has moved past the timeline of a typical infection, and the most common underlying causes are more predictable — and treatable — than most people expect.

Allergies vs. a Cold: How to Tell the Difference

Infections & Seasonal Complaints

6 min read

Allergies vs. a Cold: How to Tell the Difference

A stuffy nose and sneezing can mean either a cold or seasonal allergies, but the timeline, accompanying symptoms and a few specific clues usually make the distinction fairly clear.

Asthma in Adults: Symptoms, Triggers and Treatment

Infections & Seasonal Complaints

7 min read

Asthma in Adults: Symptoms, Triggers and Treatment

Asthma isn't only a childhood condition — it can develop for the first time well into adulthood, and adult-onset cases often follow a somewhat different pattern than the asthma most people picture.

Shingles (Herpes Zoster): Causes, Symptoms and Treatment

Infections & Seasonal Complaints

6 min read

Shingles (Herpes Zoster): Causes, Symptoms and Treatment

Shingles can only develop in people who've already had chickenpox, because it's caused by the very same virus reactivating decades after it first went dormant in the body.

HPV Explained: Transmission, Risks and Prevention

Infections & Seasonal Complaints

7 min read

HPV Explained: Transmission, Risks and Prevention

Human papillomavirus is so common that most sexually active adults will encounter it at some point, yet confusion about what it actually means for long-term health remains widespread.

Antihistamines Compared: Cetirizine vs Loratadine vs Fexofenadine

Infections & Seasonal Complaints

6 min read

Antihistamines Compared: Cetirizine vs Loratadine vs Fexofenadine

All three are sold as "24-hour, non-drowsy" allergy tablets, but they don't behave identically in the body — the differences explain why one might work better for a given person than the others.

Nasal Steroid Sprays: How They Work and How to Use Them Correctly

Infections & Seasonal Complaints

6 min read

Nasal Steroid Sprays: How They Work and How to Use Them Correctly

Nasal steroid sprays are among the most effective options for chronic congestion, yet most of their benefit depends on a technique most people never learn.

H. pylori Treatment: How This Common Infection Is Treated

Infections & Seasonal Complaints

6 min read

H. pylori Treatment: How This Common Infection Is Treated

Helicobacter pylori infects roughly half the world's population, yet most people never learn they have it until it starts causing the stomach symptoms treatment is designed to resolve.

Sore Throat That Won't Go Away: When It's Not a Simple Infection

Infections & Seasonal Complaints

7 min read

Sore Throat That Won't Go Away: When It's Not a Simple Infection

Most sore throats clear up within one to two weeks on their own. When one drags on well past that point, the explanation is often something other than a typical viral or bacterial infection entirely.

Preparing Your Immune System for Autumn and Winter

Infections & Seasonal Complaints

7 min read

Preparing Your Immune System for Autumn and Winter

The autumn uptick in illness has less to do with falling temperatures than with something much more social: everyone going back indoors and back to school at the same time. Here's how to actually get ahead of it.

Antibiotic Resistance: A Growing Global Health Threat

Infections & Seasonal Complaints

7 min read

Antibiotic Resistance: A Growing Global Health Threat

Bacteria don't just get "used to" antibiotics — they develop specific molecular defenses, and can even hand those defenses to entirely unrelated bacteria. Here's how resistance actually works, and where common advice about it needs an update.

STI Rates in Europe: What's Really Driving the Rise?

Infections & Seasonal Complaints

7 min read

STI Rates in Europe: What's Really Driving the Rise?

Sexually transmitted infections are rising across Europe, but not at the same rate everywhere. The countries seeing the smallest increases share a few specific policy choices in common.

Gastrointestinal Infections: Causes and Recovery

Infections & Seasonal Complaints

7 min read

Gastrointestinal Infections: Causes and Recovery

Not every stomach bug is the same, and a few pieces of common advice around them — the BRAT diet, sports drinks for rehydration — are more outdated than most people realize. Here's what actually distinguishes the causes and speeds up recovery.

Sore Throat: When Antibiotics Are Necessary

Infections & Seasonal Complaints

7 min read

Sore Throat: When Antibiotics Are Necessary

Most sore throats are viral, and antibiotics do nothing for them — but there's a specific clinical scoring system doctors actually use to estimate the likelihood of the one common bacterial cause before testing. Here's how it works.

Common Seasonal Infections: Symptoms and Treatment

Infections & Seasonal Complaints

7 min read

Common Seasonal Infections: Symptoms and Treatment

Cold weather itself doesn't cause infections — the real reasons illness clusters in colder months are more specific, and more interesting, than that. Here's what's actually driving the seasonal pattern, and a guide to the infections behind it.

Common Cold, Flu, or Sinusitis: How to Recognize the Difference

Infections & Seasonal Complaints

7 min read

Common Cold, Flu, or Sinusitis: How to Recognize the Difference

These three conditions share so many overlapping symptoms that they're routinely confused — but how quickly symptoms come on, and whether you feel better before getting worse again, are two of the clearest clues for telling them apart.

Seasonal Allergies: How Pollen Causes Symptoms

Infections & Seasonal Complaints

7 min read

Seasonal Allergies: How Pollen Causes Symptoms

Allergies can appear suddenly in adulthood with no clear explanation, symptom severity doesn't always track the published pollen count, and some pollen allergies quietly cross-react with certain foods. Here's the actual mechanism behind all three.