Genetics

Killer T vs. memory: DNA isn't destiny for T cells

Scientists at St. Jude Children's Research Hospital have solved an immunology puzzle. A CD8+ T cell can have two functionally distinct daughter cells after it divides, despite the cells being genetically identical. The researchers ...

Diseases, Conditions, Syndromes

Study shines light on longevity of COVID-19 immune response

By uniting research from eight cohorts across the U.S., a group of researchers has accelerated collection of data integral in answering questions about immune responses needed for long lasting protection from SARS-CoV-2. ...

Diseases, Conditions, Syndromes

US mystery hepatitis deaths rise to 6, cause still unknown

The number of US children who have died from a mysterious form of hepatitis has risen to six and the condition has now been tied to 180 cases, health authorities announced Friday, as they continued to hunt for the cause.

Diseases, Conditions, Syndromes

Dynamics of adaptive immunity in tuberculosis uncovered

Unlike other infectious diseases that affect the lungs, the immune response to fight tuberculosis (TB) infections develops at least twice as slowly. Until recently, the dynamic interplay between bacteria and the host's immune ...

Diseases, Conditions, Syndromes

COVID-19's high blood clot risk

A recent study of patient health records found that around 1 in 100 people with COVID-19 had a venal or arterial thrombosis, with rates higher still among males, and particularly for those hospitalized.

Health

How to best protect your immune system

This spring, many people may be getting sick because of COVID-19 or with something else for the first time since the pandemic began. Dr. Prathit Kulkarni, assistant professor of medicine in infectious diseases at Baylor College ...

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Infectious disease

An infectious disease is a clinically evident disease resulting from the presence of pathogenic microbial agents, including pathogenic viruses, pathogenic bacteria, fungi, protozoa, multicellular parasites, and aberrant proteins known as prions. These pathogens are able to cause disease in animals and/or plants. Infectious pathologies are usually qualified as contagious diseases (also called communicable diseases) due to their potential of transmission from one person or species to another. Transmission of an infectious disease may occur through one or more of diverse pathways including physical contact with infected individuals. These infecting agents may also be transmitted through liquids, food, body fluids, contaminated objects, airborne inhalation, or through vector-borne spread.

The term infectivity describes the ability of an organism to enter, survive and multiply in the host, while the infectiousness of a disease indicates the comparative ease with which the disease is transmitted to other hosts. An infection however, is not synonymous with an infectious disease, as an infection may not cause important clinical symptoms or impair host function.

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