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Super: What is AIDS? Voice Over: The human immune system is generally able to resist the invasion of bacteria, viruses, and other microorganisms. Voice Over: HIV is a virus that attacks and destroys CD4 cells, the disease-fighting cells of the immune system Voice Over: HIV attaches itself to a CD4 cell and fuses with it, it replicates inside the cell, Voice Over: the new HIV copies are released to infect other CD4 cells Voice Over: HIV weakens the body’s natural defences and over time severely damages the immune system Voice Over: unusual infections and cancers develop and leading to death eventually Super: Disease Progress After HIV Infection Voice Over: HIV infection results in a disease spectrum, Voice Over: with varying clinical presentations and rate of progression among infected individuals Voice Over: When the infection progresses, there is a declining number of CD4 cells and an increasing number of HIV Voice Over: A patient may have symptoms arising from opportunistic infections Voice Over: Opportunistic infection refers to a pathogen that is harmless when the immunity is normal Voice Over: Without treatment, HIV infection progresses to AIDS in years in adults Voice Over: When the HIV disease worsens further, there could be opportunistic infections or cancer-causing death Super: Routes of Transmission Voice Over: How is HIV transmitted? Voice Over: Sexual contact. HIV can be transmitted through sexual contact including vaginal, oral, and anal sex Voice Over: Vaginal and anal sex are the major routes of HIV transmission in Hong Kong Voice Over: Blood contact Voice Over: Sharing injection tools for drug taking Voice Over: Transfusion of contaminated blood or blood products Voice Over: Mother-to-child Voice Over: Infected mothers can transmit the virus to their babies during pregnancy, delivery, or breastfeeding Super: Symptoms of HIV Infection Voice Over: Most HIV infected persons have no specific or obvious symptoms during the early phase of infection Voice Over: But the infected person can still pass the virus to others Voice Over: Only an HIV test can tell whether a person has been infected by HIV Super: Can HIV be spread through Casual Contact? Voice Over: HIV is not transmitted by day-to-day activities Voice Over: such as shaking hands, hugging, kissing, dining together, or sharing toilet seats Voice Over: Besides, there is no evidence to show that mosquitoes can transmit HIV Voice Over: HIV is not transmitted through saliva, sweat, tear, or urine Super: For more information, please visit: https://www.27802211.com
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