Dr. John T Gallagher M.D.

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• How is Conjunctivitis Diagnosed?

  Nowadays, many people self-diagnose and use alternative methods to cure themselves of illnesses. They research on the internet, looking for the right fit for the symptoms they are experiencing. They then look up the treatment options for the condition they believe they have, often opting for...

• What Are Hormones?

  IntroductionHormones are a special kind of chemical messengers in the body that are created by the endocrine glands. These chemical messengers control and coordinate complex processes in the body, such as growth, metabolism, fertility, and reproduction. Hormones can also influence the body's immune...

• What Are Vaccines?

  What is a vaccine?Vaccines are products that enable a person to develop immunity against certain diseases. A vaccine can be given through needle injections, by aerosol, or by mouth. The polio vaccine is given in the form of mouth drops that contain live but weakened organisms. The vaccine gets into...

• Different Blood Types and What They Mean

  The ABO (A, B, AB, or O) blood group system is used to classify different types of antibodies in the plasma and antigens in the red blood cells (RBCs). The ABO blood group and RhD antigen determine the type of blood that is a perfect match for blood transfusions. The four ABO blood groups are: ...

• What Is Candida?

  Candida is a type of fungus which lives on the skin and an overgrowth of this fungus can cause an infection. This fungus can be present on different parts of the body. In a normal situation, the fungus is present in small quantity and does not cause any harm, but when it starts to grow, it causes an...

• Health Reasons That Can Make a Person Pass Out

  Causes of Fainting A person faints or loses consciousness for a brief time when the brain does not get enough oxygen. Fainting or passing out is also medically called syncope. Before fainting, people may experience lightheadedness, dizziness, weakness, and nausea. Others describe fainting as...