HIV and AIDS

Also called Human immunodeficiency virus

HIV (human immunodeficiency virus) is a virus that damages the cells in the immune system that fight infection. It is spread through some body fluids, most often through sex without a condom or sharing needles. Without treatment, it can lead to AIDS, the late stage when the immune system is badly damaged.

Last updated Nov 9, 2026

What it is

There is no cure, but daily treatment (antiretroviral therapy) keeps the virus under control. People on effective treatment with an undetectable viral load cannot pass HIV on through sex.

Condoms, PrEP and PEP help prevent HIV. Testing is free and confidential in many places.

Common signs

  • A short flu-like illness a few weeks after infection
  • Then often no symptoms for years
  • Later: weight loss, night sweats and repeated infections

How it is usually diagnosed

  • A blood test or finger-prick test
  • CD4 count and viral load tests

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • HIV test results
  • CD4 counts and viral loads over time
  • A list of medicines
  • HIV clinic letters

Questions to ask your doctor

  • Is my viral load undetectable?
  • Could my medicines interact with others I take?
  • What vaccinations do I need?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Possible exposure to HIV in the last 72 hours: go to a sexual health clinic or emergency department straight away about PEP

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources