larvae
immature wingless forms of insects such as mosquitoes.
leukocyte
a white cell of the blood.
live-vector vaccine
a vaccine that uses a non-disease-causing organism (virus or bacterium) to transport foreign genes into the body, thereby stimulating an effective immune response to the foreign products. This type of vaccine is important because it is particularly capable of inducing CTL activity.
lymphocytes
small white blood cells that help the body defend itself against infection. These cells are produced in bone marrow and develop into plasma cells, which produce antibodies. Also known as B cells.
lysis
bursting (and thereby death) of a cell.