Infectious Diseases

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Here’s the short, direct answer many people are searching for: H3N2 is Influenza A, not Influenza B. But that simple answer only scratches the surface. What really matters is why H3N2 behaves differently, why it often causes harsher flu seasons, and what that means for … Read more

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Quick Summary The H3N2 flu is a subtype of influenza A known for causing more severe illness, especially in older adults and young children. It spreads fast, changes often, and can overwhelm healthcare systems during peak seasons. Understanding how it behaves helps people spot it … Read more

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Understanding how long H3N2 flu lasts helps people plan care, reduce spread, and know when something is not normal. H3N2 is a strain of Influenza A that often causes more intense symptoms, especially in older adults and young children. The illness usually follows a predictable … Read more

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Influenza has not gone away. What has changed is how we prevent it. By 2025, flu prevention looks very different from what most people remember. This is not just about getting a yearly flu shot anymore. It now includes updated vaccine technology, smarter antiviral use, … Read more

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Influenza C is the quiet cousin of flu viruses. Most people have never heard of it, yet many have likely had it. It causes mild respiratory illness, often mistaken for a common cold. Still, understanding influenza C symptoms matters, especially for parents, clinicians, and people … Read more

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Influenza in 2025 still looks familiar, but doctors are noticing shifts. Symptoms are starting faster, lasting longer in some people, and showing up outside the lungs more often. Digestive issues, neurologic symptoms, and extreme fatigue are being reported more than in past seasons. This guide … Read more

Let’s dive in. I’m going to walk through what we really know about influenza (sometimes just called the flu) in 2025—how it shows up, why it happens, and what you can do about it. I’ll aim to bring you expert-level clarity without jargon, so you can use this information in real life. This is for … Read more

In this article I’ll walk you through how the flu virus works, why you catch it, which “latent” fears people often have, and exactly what you can do to reduce your risk. We’ll cover causes, transmission, high-risk groups, and prevention—from daily habits to vaccine strategy. I’ll also highlight where you should dig deeper (for example, … Read more

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Influenza A is not just a seasonal inconvenience. It is a fast-spreading viral infection that can lead to serious illness, hospital stays, and even death, especially in high-risk groups. The good news is that most cases are preventable. What this really comes down to is … Read more

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Influenza A is not just a bad cold. It is a fast-moving viral infection that can hit hard and spread quickly through families, schools, workplaces, and entire communities. To really understand how to prevent it, manage it, and protect high-risk people, you need to understand … Read more

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Influenza A is often brushed off as “just the flu.” Here’s the thing. Influenza A is not always mild, and in some cases, it can be deadly. Every year, it sends millions of people to the doctor, hundreds of thousands to the hospital, and tens … Read more

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Avian influenza, often called bird flu, is not just a disease of birds. It is a serious viral infection with real risks for humans, animals, and public health systems worldwide. Most people will never get it, but when human cases do occur, they tend to … Read more

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Influenza B is often brushed off as “just the flu,” but that mindset causes people to miss early warning signs, delay care, and spread the virus without realizing it. Influenza B symptoms can look mild at first, then hit hard within hours. For children, older … Read more

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Influenza A is not just a bad cold. It hits fast, feels intense, and can disrupt your life for days or even weeks. One of the most common questions patients ask is simple but important: how long does influenza A last? Here’s the clear answer … Read more

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Influenza A is not just a bad cold. It is a fast-moving viral illness that can hit hard, spread quickly, and lead to serious complications in the wrong setting. Knowing influenza A symptoms early can make a real difference in recovery time, complication risk, and … Read more