We conclude that only large postchiasmal lesions are likely to cause symptomatic homonymous field defects in MS, usually characterized by rapid recovery. Hemifield VEPs have a low sensitivity for the detection of postchiasmal as compared with prechiasmal abnormalities.
Alternate Titles: Bacille Calmette-GuÃ©rin vaccine, Bacillus Calmette-GuÃ©rin vaccine. BCG vaccine, vaccine against tuberculosis. The BCG vaccine is prepared from a weakened strain of Mycobacterium bovis, a bacteria closely related to M. tuberculosis, which causes the disease.
These are called âtrivalentâ flu vaccines. Now, some flu vaccines protect against 4 strains. These are called âquadrivalentâ flu vaccines. After the CDC forecasts which flu strains are likely to circulate, flu vaccine manufacturers decide whether to design a flu vaccine that includes 3 strains (2 A and one B) or 4 strains (2 A and 2 B). A quadrivalent vaccine that helps protect against 2 A strains and 2 B strains may reduce the risk of being unprotected against the flu. To learn more, visit the CDC website at. http://www.cdc.gov/flu/