CD4 cells are the most important cells in the immune system. A type of test called a CD4 count tells you how many CD4 cells there are in a small sample of blood. The more there are the better. Decisions about when to start treatment are often based on the CD4 count.

CD4 count: latest news

CD4 count resources

  • Health issues

    If you are ‘HIV positive’ this means that you have a virus called HIV in your body. It doesn’t mean that you are ill, or that...

    From: Booklets

    Information level Level 2
  • CD4 cell counts

    T-cells (or T-lymphocytes) are white blood cells that play important roles in the immune system. There are two main types of T-cells. One type has...

    From: Factsheets

    Information level Level 2
  • CD4 cell counts

    CD4 cells, sometimes also called T-cells, or T-helper cells, are white blood cells which organise the immune system’s response to bacterial, fungal and viral infections. ...

    From: Living with HIV

    Information level Level 2
  • CD4 cell counts

    CD4 cells (sometimes called T-cells, or helper cells) are white blood cells that organise your immune system’s response to infections. Your CD4 cell count is the measurement of...

    From: Booklets

    Information level Level 2
  • CD4 and viral load

    It’s important for all people with HIV to take regular blood tests. The two most important blood tests are for CD4 and viral load.A CD4...

    From: The basics

    Information level Level 1
  • Health checks

    Staff at your HIV clinic use various tests to keep an eye on your HIV. Many of these tests are done on samples of your...

    From: The basics

    Information level Level 1
  • Diagnosed with HIV at a low CD4 count

    NAM's factsheet on being diagnosed with HIV when already at a low CD4 cell count...

    From: Factsheets

    Information level Level 2
  • CD4 cell count

    Details on the CD4 count, including how it is used to predict prognosis and guide treatment decisions....

    From: HIV treatments directory

    Information level Level 4

CD4 count features

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CD4 count news selected from other sources

  • Gender difference in vital cell count of HIV patients

    Male HIV patients in rural South Africa reach the low immunity levels required to become eligible for antiretroviral treatment in less than half the time it takes for immunity levels to drop to similar levels in women, according to new research. Researchers also found a link between potential proxy measures of nutritional status and disease progression, with those reporting food shortages and use of nutritional supplements reaching lower levels of immunity faster.

    10 June 2015 | Science Daily
  • The genetics of coping with HIV

    We respond to infections in two fundamental ways. One is 'resistance,' where the body attacks the invading pathogen and reduces its numbers. Another, which is much less well understood, is 'tolerance,' where the body tries to minimize the damage done by the pathogen. A study using data from a large Swiss cohort of HIV-infected individuals gives us a glimpse into why some people cope with HIV better than others.

    12 November 2014 | Science Daily
  • Thai patients to receive free HIV drugs, regardless of CD4 count

    The Thai Public Health Ministry has started distributing free antiretroviral drugs to all HIV patients in a move to expand treatment coverage and place them under the state's monitoring system. Previously, HIV patients would receive the drugs only if their number of CD4 cells — which mark the presence of HIV antibodies — decreased to 350, compared with 500 in normal people. From Wednesday, all HIV patients would have access to the drugs without the need for a CD4 count, Deputy Public Health Minister Somsak Chunharas said on Wednesday.

    02 October 2014 | Bangkok Post
  • Point-of-care CD4 testing is economically feasible for HIV care in resource-limited areas

    A study by Massachusetts General Hospital investigators, working in collaboration with colleagues in Mozambique and South Africa, indicates that routine use of point-of-care CD4 testing at the time of HIV diagnosis would be cost effective in countries where health care and other resources are severely limited.

    17 September 2014 | Eurekalert Inf Dis
  • High CD4s Neutralize Raised Risk of Stroke in People With HIV

    People with HIV have a 40 percent greater chance of stroke than those without the virus; however, having high CD4 cells erases this increased risk.

    26 June 2014 | Aidsmeds
  • BD Launches New Point-of-Care System for HIV/AIDS Patients

    Easy-to-use CD4 analysis platform tailored to meet the needs of resource-limited settings.

    28 April 2014 | BD Biosciences press release
  • Mylan Announces CE Mark for MyT4™ Point-of-Care CD4 Diagnostic Test

    Mylan, Inc. today announced that Zyomyx's MyT4™ point-of-care CD4 diagnostic test has received the CE Certificate of Conformity in the European Union, an important step toward launching this innovative test and expanding access to affordable, accessible and reliable diagnostics for people living with HIV globally.

    10 January 2014 | Mylan
  • Wanted: a standard model of HIV and Aids diagnostics for Africa

    A standardised protocol on diagnosis and tests will streamline drug development and distribution, and provide faster treatments.

    06 August 2013 | The Guardian
  • AIDS Healthcare Foundation Applauds WHO Decision to Initiate HIV Treatment Earlier

    World Health Organization (WHO) announced this week at Treatment as Prevention conference in Vancouver, Canada, that it will raise treatment initiation guidelines for HIV-positive individuals from a CD4 count of less than 350 to a count of less than 500.

    25 April 2013 | Wall Street Journal
  • Point-of-Care CD4 Testing in Resource-Limited Settings

    Is CD4 Testing Outside of the Laboratory Ready for Prime Time?

    10 October 2012 | Medscape (requires registration)
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