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Transmission and viral load

Roger Pebody

There is less risk of passing on HIV if your viral load is undetectable because you are taking anti-HIV drugs. Not all scientists agree on how much the risk is reduced.

Using condoms correctly is the most reliable way of preventing HIV from being passed on during sex. Effective HIV treatment also reduces the risk.

Click here to see our illustrated leaflet giving basic information on HIV transmission and viral load.

This leaflet is also available in French, Portuguese, Russian and Spanish.

Transmission and viral load

Published February 2012

Last reviewed February 2012

Next review February 2015

Our information levels explained

  • Short and simple introductions to key HIV topics, sometimes illustrated with pictures.
  • Expands on the previous level, but also written in easy-to-understand plain language.
  • More detailed information, likely to include medical and scientific language.
  • Detailed, comprehensive information, using medical and specialised language.

Contact NAM to find out more about the scientific research and information used to produce this leaflet.

This content was checked for accuracy at the time it was written. It may have been superseded by more recent developments. NAM recommends checking whether this is the most current information when making decisions that may affect your health.