Tag: science & technology

Red Ribbon Express is an HIV/AIDS awareness campaign launched by the Indian Railways in collaboration with NACO (National AIDS Control Organisation). It is a train that travels across India spreading awareness about HIV prevention.

HIV specifically targets and destroys CD4+ T cells (helper T cells), which coordinate immune responses. It also infects macrophages and dendritic cells, which serve as reservoirs and transport the virus. All three cell types are crucial in HIV pathogenesis.

Direct contact with HIV-infected blood through open wounds, cuts, or mucous membranes is a documented transmission route. Healthcare workers can be exposed through needlestick injuries, and transmission can occur through blood-to-blood contact.

PEP (Post-Exposure Prophylaxis) is a 28-day course of antiretroviral medication taken after potential HIV exposure to prevent infection. It must be started within 72 hours of exposure, ideally within 24 hours. It is NOT prevention or prescription-related.

HIV tests detect antibodies produced by the immune system in response to HIV infection, not the virus itself. RNA, DNA, and T-cell counts are not what standard antibody tests identify.

A CD4 count of 200 or below indicates significant immune system damage and is a criterion for AIDS diagnosis. At this stage, antiretroviral treatment is critical to prevent opportunistic infections.

Arthur Ashe, the tennis legend who won three Grand Slam titles, died from AIDS-related complications in 1993 after receiving a tainted blood transfusion. Neither George Best nor Flo-Jo died from AIDS.

Nevirapine is a key antiretroviral drug used in prevention of mother-to-child transmission (PMTCT) programs. It can be given as a single dose to the mother during labor and to the newborn after birth.

Oil-based lubricants can weaken and break down latex condoms, making them ineffective. Water-based or silicone-based lubricants are safe - latex and polyurethane condoms themselves are effective HIV prevention tools.

The window period is the time between initial HIV infection and when the virus becomes detectable by standard tests. During this time, a person may be infected but test negative.