When a Plasmodium parasite infects an erythrocyte, it exports proteins to modify the surface of the host cell. Why doesn't the host immune system recognise this modification and remove the infected cell from the environment?

Select one:

1. The exported proteins are similar to host surface proteins so the immune system does not attack them
2. The exported proteins constantly vary in sequence causing confusion of the immune system
3. Infected cells bind to the inside of the host blood vessels and immune cells bypass them
4. The process happens so fast that the host immune system can't keep up

Over years, a virus-infected cell slowly transformed into a cancerous cell exposing (due to mutations) changed antigens, i.e. proteins, on its cell surface. Which of the following cells of the immune system are most likely to recognize and attack this transformed cell?

A) tissue macrophages B) neutrophils C) natural killer (NK) cells

D) cytotoxic T cells

E) plasma cells

vaccines work by priming the immune system and inducing theformation of antibodies and memory cells. when the actual virusinfects the hosts immune system recognizes it and responds to it.What feature of viruses helps thwart this system? the envelopsprevents immune system recognition, autocatalytic proteinsreplicate without genetic material, integration of viral genescamouflages the virus, shedding the capsid inactivates theantibodies, or the high mutation rate of the viral genome

Compare and contrast B cells and T cells, in terms of their fuctions in the immune system and the cell-surface proteins they express, How do they interact to fight foreign molecules?