An infection is the invasion of tissues by pathogens, their multiplication, and the reaction of host tissues to the infectious agent and the toxins they produce. [1] An infectious disease, also known as a …

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

If you have an ongoing infection, frequent follow-ups with your provider can help ensure your condition doesn’t worsen. You should also talk to your provider if you plan to travel outside of the country you …

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. But other …

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 cells in …

Jun 2, 2024 · What’s the difference between a bacterial and viral infection? WebMD explains, and provides information on the causes and treatments for both.

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 functions and …

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, fungi, and …

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

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.