Diseases, Conditions, Syndromes

Eating elderberries can help minimize influenza symptoms

Folk medicines and herbal products have been used for millennia to combat a whole range of ailments, at times to the chagrin of modern scientists who have struggled to explain their medicinal benefits.

Diseases, Conditions, Syndromes

Revealed: the secret superpower that makes C. difficile so deadly

A new discovery about dangerous Clostridium difficile diarrhea has identified a new way that the bacteria – and possibly others like it – cause severe disease. "C. diff" is the most common hospital-acquired infection; ...

Medical research

Advance in CAR T-cell therapy eliminates severe side effects

An advance in the breakthrough cancer treatment known as CAR T-cell therapy appears to eliminate its severe side effects, making the treatment safer and potentially available in outpatient settings, a new USC study shows.

HIV & AIDS

Gene-editing technique opens door for HIV vaccine

The human body cannot naturally defend itself against HIV—not usually, at least. But in very rare cases, infected individuals generate broadly neutralizing antibodies, or bNAbs, that fight the virus. Now, Rockefeller scientists ...

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White blood cell

White blood cells (WBCs), or leukocytes (also spelled "leucocytes"), are cells of the immune system defending the body against both infectious disease and foreign materials. Five different and diverse types of leukocytes exist, but they are all produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell. Leukocytes are found throughout the body, including the blood and lymphatic system.

The number of leukocytes in the blood is often an indicator of disease. There are normally between 4×109 and 1.1×1010 white blood cells in a litre of blood, making up approximately 1% of blood in a healthy adult. An increase in the number of leukocytes over the upper limits is called leukocytosis, and in leukopenia, this number is much lower than the lower limit. The physical properties of leukocytes, such as volume, conductivity, and granularity, may change due to activation, the presence of immature cells, or the presence of malignant leukocytes in leukemia.

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