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Hepatitis B virus infection
- ... must give a detailed history, including recent travel, infections, medicines, and health problems. Also, the American Red Cross and other donation groups test donated blood for viruses like HIV (the virus that causes AIDS), hepatitis B, hepatitis C, syphilis, and West Nile virus. Because ...
- ... T cells and natural killer cells , and their B cells do not function. Symptoms of SCID occur ... evaluate the numbers and types of T and B cells present and their ability to function. Research ...
(Nemours Foundation) 
(National Institute of Allergy and Infectious Diseases) 