Jan 7, 2026 · 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.

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 of infectious …

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

Jun 12, 2025 · Germs are a part of everyday life. Germs live in our air, soil, water and in and on our bodies. Some germs are helpful, others are harmful. An infection occurs when germs enter the body, …

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 …

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

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 …

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.

Jul 11, 2025 · Infections develop when harmful microorganisms such as viruses, bacteria, fungi, or parasites enter the body and grow, disrupting normal functions and causing illness. These germs …

Nov 25, 2025 · In some cases, it can be hard to figure out if a bacterial infection or a viral infection is causing your symptoms. Both infections can cause the same diseases, such as pneumonia, …