Answer: there can be two possibilities and both may work hand in hand- B.The patient's own immune system would destroy the transfused T cells before they could respond to the viral infection and
D.Donor T cell viral antigen recognition is restricted by MHC molecules not expressed in the patient.
Explanation: MHC class II are expressed on B and T cells and they will be responsible for presenting the viral peptide to T cells who will then recognize and initiate the reactions to remove viral cells.An effective immune response against viral infections depends on the activation of cytotoxic T cells that can clear infection by killing virus-infected cells. Proper activation of these T cells depends on professional antigen-presenting cells, such as dendritic cells (DCs)
Perforin first makes a pore, or hole, in the membrane of the infected cell. Cytotoxins go directly inside the cell through this pore, destroying it and any viruses inside. This is why Killer T-cells are also called Cytotoxic T-cells. The pieces of destroyed cells and viruses are then cleaned up by macrophages.
Flood being referred to a peril that can be covered by this policy is correct regarding DIC policies in this scenario.
<h3>What is DIC policy?</h3>
This is referred to as Difference in conditions (DIC) insurance and usually covers some perils not included by the standard insurance policies in most companies.
An example of the incidents covered by DIC policies include flood, theft etc which aren't easily predictable unlike the other forms of risks such as illnesses etc.
This is therefore the reason why it was chosen as the most appropriate choice.
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Are there options? It can be a wide choice to choose from and would help if you could be more specific.
