Tag: cancer and aids

Solution: 

• AIDS (acquired immunodeficiency syndrome) is caused by the HIV virus.
• AIDS does not spread from person to person through direct contact (touching a person who has the infection), indirect contact (touching a contaminated object), or droplet contact (inhaling droplets made when a person who has the infection coughs, sneezes, or talks).
• Hence AIDS does not spreads through contact with clothes of an AIDS patient.
• So,the correct answer is 'Through contact with clothes of an AIDS patient'.

• AIDS (acquired immunodeficiency syndrome) is caused by the HIV virus
• T-helper cells play an important role in adaptive immunity. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells.
• HIV replicates rapidly in helper T-lymphocytes(CD 4) and damages a large number of them. They're responsible for keeping you healthy from common diseases and infections. As HIV gradually weakens your natural defences, signs and symptoms will occur.
• So, the correct answer is 'HIV replicates rapidly in helper T-lymphocytes and damages a large number of them'.

•  Vaccines typically work by triggering the immune system to produce antibodies that help to beat infections.
•  But most antibodies can't secure and neutralize HIV. 
• The proteins on the surface of the virus mutate rapidly and change shape continuously. 
• Hence, HIV does not escape but attacks the acquire immunity response is correct regarding AIDS causative HIV.
• So, the correct answer is 'HIV does not escape but attacks the acquire immunity response'.

• A retrovirus is a type of RNA virus that inserts a copy of its genome into the DNA of a host cell that it invades, thus changing the genome of that cell. 
• Such viruses are either single-stranded RNA (e.g. HIV) or double-stranded DNA (e.g. Hepatitis B virus) viruses.
•  In most viruses, DNA is transcribed into RNA, and then RNA is translated into protein.
•  However, retroviruses function differently, as their RNA is reverse-transcribed into DNA, which is integrated into the host cell's genome (when it becomes a provirus), and then undergoes the usual transcription and translational processes to express the genes carried by the virus. Hence, HIV belongs to the retrovirus group.

AIDS is a viral disease transmitted through certain body fluids such as semen, saliva, blood, the breast milk of an AIDS infected person by sexual contact,  breastfeeding from HIV-infected mother can transmit AIDS to the baby and by blood transfusion. During hug, no body fluid is entered into the body from one person to another. Thus, the correct answer is option B.

AIDS (Acquired immunodeficiency syndrome) is an infection which is caused by Human immunodeficiency virus (HIV). The causative agent of the disease is a virus and so the disease can spread from one person to the other by sexual contact. The disease also spreads through the use of the infected needles, syringes and blood transfusion from the infected person.

HIV causes AIDS by destroying or depleting the number of CD4+ cells or they may functionally impair the cells. This reduces the ability of the immune system to fight against diseases. So, the correct option is 'depleting CD+4 T-helper lymphocytes'.

HIV multiplies in macrophages and then new viruses targets T - helper cells which makes the infected person immuno - deficient . So the correct option is "T- helper cells"

HIV is a human immunodeficiency virus. When a person is infected by the HIV, it causes HIV infection. It affects the immune system of the body. It infects cells of the human immune system, such as helper T (T$ _H$) cells (CD$ _{4+}$ T cells), macrophages and dendritic cells. Due to this, it is difficult for the body to fight off other infections.