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

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 …

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 …

Jun 12, 2025 · Infection control prevents or stops the spread of infections in healthcare settings. Healthcare workers can reduce the risk of healthcare-associated infections and protect …

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. …

Aug 31, 2025 · 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.

Sep 7, 2025 · Infections can occur throughout the body whether caused by bacteria, viruses, parasites, or fungi. Learn some of the signs and symptoms of an infection.

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 …

There is a close connection between microbes and humans. Experts believe about half of all human DNA originated from viruses that infected and embedded their nucleic acid in our …

The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov. Updates regarding government operating status and …