Dr. Eric Boon tsou Chan M.D.

Lymphocytes are a type of white blood cell produced in the bone marrow. A few lymphocytes enter the bloodstream while some move into the lymphatic system. Having a low or high lymphocyte count can help identify a person's medical condition. Normal lymphocyte counts usually vary from one laboratory...

What is HIV?HIV is a virus that was discovered in the 1980s. It attacks a person's immune system, causing it to be too weak to fight outside infections. The HIV virus works by destroying white blood cells, called CD4 cells, in the immune system, and progresses through three stages, the last of which...

Tips to prevent the flu:Get flu shots – Flu vaccinations still remain the best way to prevent flu in the season. One should ideally get vaccinated in fall to avoid the chances of getting flu. If one has missed it, try to get the shot in winter. One can chose either a flu shot that contains killed...

First introduced in China, E-cigarettes, or electronic cigarettes, are devices that make nicotine vapors for inhaling. It is battery powered, and is a popular choice for people who do not want to inhale smoke that is in normal cigarettes. It is considered as an alternative for tobacco lovers as the...

What is lightheadedness?Lightheadedness or feeling faint may not always be a cause for concern. However, it may also indicate an underlying health problem and can increase the risk of falling and fall-related injuries. If you feel lightheaded, drink water or fluids containing electrolytes and take...

A warning has been issued by the FDA and the Consumer Product Safety Commission (CPSC) against the use of sleep-positioning devices for babies. About 12 deaths have been reported with the use of these devices in the last 13 years.FDA principal deputy commissioner, Joshua Sharfstein, reported that...