Evidence-Based Medical Knowledge You Can Trust
Infectious diseases are illnesses caused by bacteria, viruses, fungi, or parasites, spreading through contact, food, water, or vectors.
The chicken pox vaccine 2026 remains a critical component of preventive medicine in the United States. Chicken pox, clinically known as varicella, is caused by the varicella-zoster virus (VZV). Although often perceived as a mild childhood illness, varicella can cause severe complications in adults, infants, pregnant individuals, and immunocompromised patients. By 2026, vaccination strategies continue … Read more
There have been at least 7.5 million illnesses and 3,100 deaths from flu this season, according to CDC data. And flu cases are expected to rise significantly in the coming weeks.
The term superbug refers to a microorganism—most commonly bacteria—that has developed resistance to multiple antimicrobial drugs used to treat infections. In clinical medicine, superbugs are a major public health threat because standard antibiotics become ineffective, leading to prolonged illness, higher medical costs, increased transmission, and elevated mortality risk. Superbugs do not represent a single organism. … Read more
The term “killer fungus” is not a formal medical diagnosis. It is a media and public-health term most commonly used to describe life-threatening invasive fungal infections, especially Candida auris, a multidrug-resistant yeast associated with high mortality rates in hospitalized and immunocompromised patients. In clinical medicine, these infections are categorized as invasive mycoses, meaning fungal pathogens … Read more
Measles is a highly contagious viral illness caused by the measles virus, a member of the Paramyxoviridae family. Despite widespread vaccination efforts, measles continues to affect children worldwide, including outbreaks in regions with declining immunization coverage. Understanding measles symptoms in children is essential for early recognition, isolation, and prevention of serious complications. In children, measles … Read more
Measles is often considered a childhood illness, yet adults remain vulnerable—particularly those who are unvaccinated, under-vaccinated, or exposed during outbreaks. Adult measles can present with more severe symptoms and a higher risk of complications compared to childhood cases. Understanding measles symptoms in adults is critical for early detection, prompt isolation, and timely medical care. This … Read more
Measles is a highly contagious viral illness caused by the measles virus, a member of the Paramyxoviridae family. Despite global vaccination programs, measles remains clinically relevant due to outbreaks in unvaccinated or under-vaccinated populations. Understanding measles symptoms is critical for early detection, isolation, and prevention of severe complications. Measles symptoms follow a predictable clinical progression. … Read more
Influenza, commonly known as the flu, is an acute viral respiratory infection that affects children at higher rates than adults. Children not only contract influenza more frequently but also play a major role in community transmission due to prolonged viral shedding. Understanding influenza symptoms in children is essential for early diagnosis, appropriate care, and prevention … Read more
Influenza, commonly known as the flu, is a contagious respiratory illness caused by influenza viruses. In adults, influenza symptoms can range from mild discomfort to severe, life-threatening complications. Understanding how symptoms present, progress, and differ from other respiratory illnesses is critical for early recognition, timely treatment, and prevention of complications—especially for high-risk populations, including individuals … Read more
Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Quick Summary “Super flu” is a non-technical term used to describe unusually severe influenza infections with intense symptoms, higher complication risk, and prolonged recovery compared with typical seasonal flu. What Is Meant by “Super Flu”? “Super flu” is not a formal medical diagnosis. It is … Read more
Medically Reviewed and Compiled by Dr. [Adam N. Khan], MD. Influenza (flu) is an acute viral respiratory illness caused primarily by influenza A and B viruses. It affects millions of people globally each year and ranges from mild, self-limiting illness to severe disease with complications, hospitalization, or death. Understanding the symptoms of flu is critical … Read more
Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Adenovirus is a common but often misunderstood viral infection that affects people of all ages. One of the most frequently asked questions by patients, caregivers, and clinicians is: how long is adenovirus contagious? Understanding the contagious period is critical for infection control, school and workplace … Read more
Understanding how long is the flu contagious is critical for preventing spread, protecting vulnerable populations, and making informed decisions about isolation, work, and school attendance. Influenza, including Flu A, spreads efficiently through respiratory droplets and contaminated surfaces. People often underestimate contagious periods because symptoms may appear mild, delayed, or already improving while viral shedding continues. … Read more
Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Adenovirus symptoms vary widely, ranging from mild cold-like illness to severe, life-threatening infections. Adenoviruses are a group of common viruses that infect the respiratory tract, eyes, gastrointestinal system, and urinary tract. They affect people of all ages but are especially common in children, military recruits, … Read more
Medically Reviewed and Compiled by Dr. Adam N. Khan, MD. Adenovirus infections are common worldwide and affect individuals across all age groups. While many infections are mild and self-limiting, adenoviruses can cause severe disease in infants, older adults, immunocompromised patients, and individuals in crowded or institutional settings. Because there is no widely available antiviral cure … Read more