ques = new Array()
cor = new Array()

ans = new Array()
ans[1] = new Array()
ans[2] = new Array()
ans[3] = new Array()
ans[4] = new Array()
ans[5] = new Array()
ans[6] = new Array()
ans[7] = new Array()
ans[8] = new Array()
ans[9] = new Array()
ans[10] = new Array()

fb = new Array()
fb[1] = new Array()
fb[2] = new Array()
fb[3] = new Array()
fb[4] = new Array()
fb[5] = new Array()
fb[6] = new Array()
fb[7] = new Array()
fb[8] = new Array()
fb[9] = new Array()
fb[10] = new Array()


ques[1] = "The immune system only reacts against living pathogens."
cor[1] =2
ans[1][1]="True."
ans[1][2]="False."
ans[1][3]="Not sure."
fb[1][1]="Sorry that's not correct. Remember that vaccines are not living and also things like pollen can trigger an immune response."
fb[1][2]="Correct. The immune system reacts against antigens. These can be on living or dead pathogens and also on other foreign material like pollen."
fb[1][3]="Oh dear. The immune system reacts against antigens. These can be on living or dead pathogens and also on other foreign material like pollen."


ques[2] = "How is malaria spread?"
cor[2] =3
ans[2][1]="By having unprotected sex."
ans[2][2]="Direct person-to-person contact."
ans[2][3]="In the bite of an infected mosquito."
fb[2][1]="No, that's not right. HIV/AIDS can be transmitted by having unprotected sex."
fb[2][2]="Malaria is not spread directly from one person to the next."
fb[2][3]="Yes, that's right. Infected mosquitos pass the malaria parasite directly into the blood stream when it bites a human."


ques[3] = "What is a pathogen?"
cor[3] =1
ans[3][1]="An organism that causes a disease."
ans[3][2]="A molecule on the surface of a bacteria."
ans[3][3]="A cell that can enter the body."
fb[3][1]="That's right. A pathogen causes disease."
fb[3][2]="No, that's not right. Antigens are the molecules on the surface of microbes like bacteria."
fb[3][3]="Pathogens are micro-organisms but this description is too broad."


ques[4] = "What are antibodies?"
cor[4] =2
ans[4][1]="Types of white blood cells."
ans[4][2]="Specific proteins that destroy pathogens."
ans[4][3]="Molecules on the surface of pathogens."
fb[4][1]="Bad luck. Antibodies are actually produced by white blood cells."
fb[4][2]="Excellent. They are produced by lymphocytes and kill pathogens."
fb[4][3]="Sorry but that's not right. Antibodies attach to the molecules (called antigens) on the outside of pathogens."


ques[5] = "What is an antigen?"
cor[5] =1
ans[5][1]="A marker molecule on the surface of a pathogen."
ans[5][2]="A molecule on the surface of a white blood cell."
ans[5][3]="Protein made by lymphocytes that kill pathogens."
fb[5][1]="That's right. Antigens are molecules that identify foreign pathogens."
fb[5][2]="Bad luck. Antigens are on the surface of pathogen and not lymphocytes."
fb[5][3]="No. The proteins made by lymphocytes are called antibodies. They attach to antigens on the surface of invading pathogens."

ques[6] = "What is given to the body in a vaccination?"
cor[6] =2
ans[6][1]="Antibodies against the disease?"
ans[6][2]="Dead pathogens or parts of their antigens."
ans[6][3]="Live pathogens to stimulate the immune system."
fb[6][1]="Antibodies would only be given to treat an infected person in an emergency."
fb[6][2]="Yes, the dead pathogen stimulates the immune system but does not cause the disease."
fb[6][3]="Live pathogens would not be used. They would cause the disease."

ques[7] = "How does vaccination work?"
cor[7] =3
ans[7][1]="The immune system produces antibodies which stay in the blood."
ans[7][2]="The dead pathogen stays in the body and constantly stimulates the immune system."
ans[7][3]="Memory lymphocytes are produced. They remain in the body to fight off any future infection with the live pathogen."
fb[7][1]="Not really. Antibodies will be made but they will have disappeared in a few weeks."
fb[7][2]="Not quite. The pathogen would be destroyed but memory cells would remain behind."
fb[7][3]="That's right. Memory lymphocytes remain for many years and are ready to fight the infection if a live pathogen enters the body."

ques[8] = "Influenza is caused by a virus. What treatments would be effective against a viral infection?"
cor[8] =3
ans[8][1]="Antibiotics."
ans[8][2]="Antibiotics and vaccination."
ans[8][3]="Vaccination."
fb[8][1]="Antibiotics are no use against an infection that is caused by a virus."
fb[8][2]="Vaccinations would be used but not with antibiotics."
fb[8][3]="Vaccinations are used to prevent a person from catching influenza."

ques[9] = "What does the Human Immunodeficiency Virus (HIV) attack?"
cor[9] =3
ans[9][1]="Liver cells."
ans[9][2]="Brain cells."
ans[9][3]="White blood cells."
fb[9][1]="Sorry, it does not infect liver cells."
fb[9][2]="HIV does not infect brain cells."
fb[9][3]="Excellent. HIV attacks white blood cells. It destroys the lymphocytes that control the immune response."

ques[10] = "What does it mean when a person is said to have 'full blown AIDS'?"
cor[10] =1
ans[10][1]="The HIV has damaged their immune system so that it no longer works."
ans[10][2]="They are infected with HIV but not showing any symptoms."
ans[10][3]="A blood test has shown that they have antibodies against the HIV in their blood."
fb[10][1]="Yes. The virus has destroyed their immune system and they are open to many other infections."
fb[10][2]="This is a person who is 'HIV positive'. They can still spread the virus even though they may not know that they have it."
fb[10][3]="This is a person who is 'HIV positive'. They can still spread the virus even though they may not know that they have it."