Causes of AIDS: How HIV Spreads

Causes of AIDS: How HIV Spreads

AIDS has exactly one cause: untreated infection with HIV. Understanding how the virus spreads - and how it does not - is the most powerful protection there is, for individuals and against stigma.

The Routes of Transmission

HIV spreads only through specific body fluids - blood, semen, vaginal and rectal fluids, and breast milk - entering the bloodstream:

• Unprotected sex: the most common route worldwide; risk falls dramatically with condoms and with treatment (U=U)
• Shared needles and syringes: injecting drug use, unsafe tattooing or piercing equipment
• Mother to child: during pregnancy, delivery, or breastfeeding - nearly fully preventable with treatment in pregnancy
• Blood transfusion and organ transplant: extremely rare now in countries with screened blood supplies
• Occupational exposure: needle-stick injuries in healthcare - preventable and treatable with PEP, per NHS HIV and AIDS guidance

How HIV Does NOT Spread

• Hugging, kissing, shaking hands
• Sharing food, utensils, toilets, or swimming pools
• Mosquito or insect bites
• Coughing, sneezing, sweat, or tears
• Working, studying, or living with someone who has HIV

What the Virus Does

HIV infects CD4 immune cells and uses them to replicate. Untreated, the CD4 count falls over years - silently at first - until the immune system can no longer fight infections and cancers it would normally suppress. That collapse is AIDS.

The Classical Lens

Sushruta Samhita's Aupasargika Roga (communicable diseases) lists transmission by bodily contact, shared air and food, and sexual union - the classical recognition of person-to-person spread. The classical frame also describes Ojas Kshaya (immune depletion) as the result of severe, unrelenting disease - matching the mechanism of untreated HIV. These are interpretive parallels, not medical facts about the virus.

Frequently Asked Questions

Can I get HIV from kissing? No. HIV does not spread through saliva. Deep kissing is not a transmission route.

Is HIV still spreading because of "risk groups"? HIV risk attaches to activities, not identities. Anyone having unprotected sex or sharing needles can be exposed; anyone can test.

Can a mother with HIV have an HIV-negative baby? Yes - with ART during pregnancy and proper delivery care, transmission risk falls to under 1%.

Conclusion

HIV spreads through a short, specific list of routes - and every one of them is preventable. Fear of casual contact has no basis; testing, protection, and treatment have all the basis in the world.

References

• NHS - HIV and AIDS
• Ministry of AYUSH, Government of India