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Different types of immunity:Natural –active:Natural infection occurs during infection. It is activebecause the lymphocytes are active by the antigens on the pathogens surface.

When the body comes into contact with an infection, the immune systems responseincreases. This is by producing antibodies which fights the infection.  Natural-passive:All infants are born with an immune system, antibodies are transferredto the infants.

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This is to allow an effective response to a potential pathogen.Although some species have more layers within the placental barrier, it couldaffect the transfer of immunity. Infants need colostrum. This is needed withinthe first 24 hours of them being born. It is needed within the 24 hours as itcontains concentrated antibody molecules, vitamins, nutrients and water. Theantibodies are absorbed through the intestinal wall, this Is within the firstfew hours of them being born. If the mother had been recently vaccinatedagainst diseases, then the infant will receive antibodies to fight againstdiseases. Artificial- active:Artificial active is by taking injections or antigens by themouth.

Evaluation:The immune system has positive and negative effects of theway it responds:Negative:The immune system works against diseases, there are a lot ofnegative responses that happen. When the body doesn’t have enough white bloodcells, not a lot of organisms can be destroyed. This means the elimination isslowed down and that lets the effects last longer. A metabolism that is slowcan be caused by a sudden change in stress or in diet. This effects the hormonelevels that are released, causing the bodies strength to change which may becometoo weak to fight against the disease. An example is if the body doesn’t have/get enough white blood cells or has a slow metabolism. This causes the symptomsof a disease to last longer which can make them a lot more harmful.

This is dueto the body not being able to fight it quick enough.The immune system normally fights treatment/ medication. Thisis due to it being seen as a forgein body. Even though the immune systems aimis to defend us against foregin bodies. When it comes down to animals that arebeing given treatment, the immune system doesn’t notice the difference betweena body that is harmed and a treatment. This can be dangerous if the immunesystem rejects a certain treatment for an infection/disease. This causes thesymptoms to increase worsens and the disease can then take over due to the bodyweakening by using its energy to fight that treatment.

Positive:The immune system responds/defends the body against disease.When the immune system is infected the response Is to get rid of the infection.However, even though it causes negative symptoms e.

g vomiting. It is removingthe dangerous pathogens and infection from the body. This reduces the negativeeffects of the disease.