The word infection can denote any presence of a particular pathogen at all (no matter how little) but also is often used in a sense implying a clinically apparent infection (in other words, a case …

Sep 19, 2025 · An infection occurs when a microorganism — such as bacteria, fungi, or a virus — enters a person’s body and begins multiplying.

Upper Respiratory Infection (URI) Upper respiratory infections (URIs) are viruses and bacteria that infect your respiratory tract above your vocal cords. Symptoms can include a runny or stuffy …

Apr 8, 2025 · Symptoms of infectious diseases vary depending on the cause of the infection. But they often include fever and tiredness. Rest and home remedies may clear up mild infections. …

Infection is the process by which harmful microorganisms such as bacteria, viruses, fungi, or parasites enter cells and tissues in the body and cause disease.

What Is an Infection? An infection is a condition caused by harmful microorganisms such as bacteria, viruses, fungi, or parasites invading the body. These pathogens disrupt normal bodily …

Sep 7, 2025 · An infection is the invasion of the body by a disease-causing organism called a pathogen. Infections can be caused by a wide range of pathogens, including bacteria, viruses, …

Infection occurs when germs enter your body and multiply, resulting in disease. The four main types of infections are viral, bacterial, fungal, and parasitic.

2 days ago · A newly identified virus–cell hybrid structure allows viruses to spread faster and more aggressively by hitching a ride on migrating cells. Viruses rely on efficient movement between …

Infection occurs when viruses, bacteria, or other microbes enter your body and begin to multiply. Disease, which typically happens in a small proportion of infected people, occurs when the …