Infection risk
You'll be at risk of developing infections you wouldn't normally be at risk of if your immune system has been damaged by the HIV virus.
These opportunistic infections, as they're called, happen when you have a very weak immune system.
But if you take your HIV treatment, the likelihood of developing these is low.
The four main types of opportunistic infections are:
People with advanced HIV also have a higher risk of developing some forms of cancer, such as cancer of the lymphatic system (lymphoma).
Pneumonia
Bacterial pneumonia can develop as a complication of other infections, such as flu. It can be treated with antibiotics. Left untreated, pneumonia can be fatal.
Everyone with a long-term condition such as HIV is encouraged to get a flu jab each autumn to protect against seasonal flu.
It's also recommended they have a pneumoccocal vaccination, which protects against a serious chest infection called pneumococcal pneumonia.
Pneumocystis pneumonia (PCP)
Pneumocystis pneumonia (PCP) is a fungal infection of the lungs, which can be life threatening if not treated promptly.
Before advances in HIV treatment, PCP was the leading cause of death among those with HIV in the developed world.
Symptoms of PCP include:
- a persistent dry cough
- shortness of breath
- difficulty breathing
- fever (in some cases)
Report any symptoms of PCP straight away as the condition can suddenly worsen without warning.
PCP can be treated with antibiotics. If your CD4 count drops below 200, you may be given antibiotics to take every day until your CD4 count rises above 200.
Tuberculosis (TB)
Tuberculosis (TB) is another bacterial infection. Globally, it's one of the leading causes of death for people who are HIV positive.
The bacteria responsible for causing TB can sometimes pass from one person to another through the air. But many people who have TB aren't infectious.
TB can be treated using antibiotics, but some strains of bacteria have developed antibiotic resistance and these can be more difficult to treat.
Candidiasis (thrush)
Candidiasis is a fungal infection that's common in people living with HIV. It causes a thick, white coating to appear on the inside of the mouth, tongue, throat or vagina.
Candidiasis is rarely serious, but it can be both embarrassing and painful. It can be treated with antifungal creams and tablets.
Tell the staff at your HIV clinic if you have repeated bouts of candidiasis as it could be a sign of a low CD4 count.
Cancer
People with advanced HIV have an increased risk of developing some types of cancer.
It's estimated someone with untreated late-stage HIV infection is 100 times more likely to develop certain cancers compared with someone without the condition.
The two most common cancers to affect people with HIV are:
- lymphoma – cancer of the lymphatic system, a network of glands that makes up part of our immune system
- Kaposi's sarcoma – this causes lesions to grow on your skin, and can also affect your internal organs
HIV treatment is important in reducing your risk of cancer and long-term conditions, such as cardiovascular and respiratory disease. If you smoke, giving up is also important in reducing this risk.