Blood consists of a liquid called plasma, red blood cells, white blood cells and platelets. Red bloods cells deliver oxygen from your lungs to your tissues and organs, white blood cells fight infection as part of your body's defense system, and platelets help blood clot when you experience a cut or wound. Blood is a constantly circulating fluid providing the body with nutrition, oxygen, and waste removal. Your blood group depends on which antigens occur on the surface of your red blood cells.
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New evidence shows that many people with type 2 diabetes test their blood sugar levels too often, which costs hundreds of dollars a year.
New research focuses on an accurate blood test for Alzheimer's disease. If scientists replicate the study's promising results, it may be a breakthrough.
Is it actually a good idea for people with diabetes to fast before having a blood cholesterol test? A new study suggests this may do more harm than good.
A person has an undetectable viral load when there are so few viral copies of HIV in their blood that a blood test cannot detect them. This is good for a person’s overall health and means that they cannot transmit the virus to another person. Learn more about an undetectable viral load and how doctors measure it here.
Eosinophils are a type of white blood cell that help the body fight off infections. The test involves a doctor drawing blood. An eosinophil count may be either too high or too low, which may indicate an underlying condition, or it may be in the normal range. Learn more about eosinophil count here.
Viral load is the amount of HIV per milliliter of blood. Antiretroviral therapy aims to reduce a person’s viral load to undetectable levels, where the virus is no longer transmittable. Here, we discuss what viral load and CD4 levels mean for a person living with HIV.
A fever may be one of the initial symptoms of an acute HIV infection soon after exposure to the virus. In this article, learn about an HIV fever and other early symptoms.
There are many myths about HIV and AIDS, including some about transmission. Developments in treatment mean that a person’s risk of contracting or transmitting HIV is significantly reduced. It is also vital to note that people cannot transmit AIDS, which develops from untreated HIV. Learn more.
Low sodium in the blood can cause confusion, lethargy, and nausea. Treatment depends on the cause. Learn more about low sodium levels, risk factors, prevention and treatment here.
A ferritin blood test is a simple way to check a person's iron levels. In this article, we discuss normal, low, and high levels, what they mean, and how to alter blood ferritin levels.
If blood does not clot, life-threatening bleeding can occcur. Find out about how blood clots, how clotting factors work, and how treatment has improved the outlook for people with hemophilia.