Skip to main content
UKHSA data dashboard

BetaThis is a new service - your feedback will help us to improve it.

Information
Yellow heat health alerts issued for the East Midlands, East of England, London, North West, South East, South West and West Midlands

Regions affected include the East Midlands, East of England, London, North West, South East, South West and West Midlands from 9am on Tuesday 14 July until Friday 17 July at 9pm. For more information, please see the Weather health alerts page.

Entry title:

Transfusion transmitted infections (TTI) surveillance

Last updated on Thursday, 16 July 2026 at 10:43am

This dashboard covers investigations and outcomes of suspected transfusion transmitted infections (TTIs) in blood donors and recipients. The data shows confirmed TTIs, by year of transfusion, since TTI surveillance started in 1995. See the annual SHOT (Serious Hazards of Transfusion) report for more details.

Overview

The NHSBT/UKHSA joint Epidemiology Unit collates investigations and outcomes of suspected TTI incidents across the four UK Blood Services (NHS Blood and Transplant, Welsh Blood Service, Northern Ireland Blood Transfusion Service and the Scottish National Blood Transfusion Service),  in collaboration with Serious Hazards of Transfusion (SHOT). The year of transfusion may be prior to year of report to SHOT due to delay in recognition of chronic infection.

This surveillance data contributes to informing or evaluating policy changes relating to infection risk and provides assurance of the safety of the UK blood supply as a result of the effective measures and haemovigilance systems in place to reduce TTIs. Policies and procedures are constantly reviewed to see if any other mitigations are required.

Number of bacterial transfusion transmitted infections (TTIs) investigated, UK

The number of suspected bacterial TTIs investigated in the UK, by year of transfusion. Figures are annual, but shown as at January of each year. For example, the figures for 2022 are shown as at "Jan 2022".

Up to and including year starting 1 Jan 2025

ChartThere is only 1 plot on this chart. The horizontal X-axis is labelled 'date'. Whilst the vertical Y-axis is labelled 'metric'. This is a dark blue solid line plot. The plot has a label of 'Bacterial'. This plot shows data for transfusion-safety. Specifically the metric 'transfusion-safety_testing_investigated' for the United Kingdom area, along with the age banding of 'all' for the gender group of all. This plot shows data from 01 January 1996 to 01 January 2025. It rose from 2.0 on 01 January 1996 to 25.0 on 01 January 2000. It fell from 32.0 on 01 January 2001 to 31.0 on 01 January 2005. It rose from 51.0 on 01 January 2006 to 95.0 on 01 January 2010. It rose from 103.0 on 01 January 2011 to 108.0 on 01 January 2015. It rose from 103.0 on 01 January 2016 to 128.0 on 01 January 2020. And finally. It fell from 115.0 on 01 January 2021 to 96.0 on 01 January 2025. There is no reporting delay period being tracked for the data on this chart. - Refer to tabular data.
Tabular data

Number of bacterial transfusion transmitted infections (TTIs) investigated, UK data for the number of suspected bacterial TTIs investigated in the UK, by year of transfusion. Figures are annual, but shown as at January of each year. For example, the figures for 2022 are shown as at "Jan 2022".

Up to and including 1 January 2025

Year of transfusion Bacterial
1 Jan 202596.00
1 Jan 2024122.00
1 Jan 2023113.00
1 Jan 2022111.00
1 Jan 2021115.00
1 Jan 2020128.00
1 Jan 2019139.00
1 Jan 201894.00
1 Jan 2017104.00
1 Jan 2016103.00
1 Jan 2015108.00
1 Jan 201493.00
1 Jan 2013102.00
1 Jan 2012100.00
1 Jan 2011103.00
1 Jan 201095.00
1 Jan 200934.00
1 Jan 200819.00
1 Jan 200728.00
1 Jan 200651.00
1 Jan 200531.00
1 Jan 200444.00
1 Jan 200348.00
1 Jan 200226.00
1 Jan 200132.00
1 Jan 200025.00
1 Jan 199921.00
1 Jan 199818.00
1 Jan 199712.00
1 Jan 19962.00
Download

Download data

Select format

Confirmed bacterial transfusion transmitted infections (TTIs), UK

The number of confirmed bacterial TTIs in the UK, by year of transfusion. Figures are annual, but shown as at January of each year. For example, the figures for 2022 are shown as at "Jan 2022".

Up to and including year starting 1 Jan 2025

ChartThere is only 1 plot on this chart. The horizontal X-axis is labelled 'date'. Whilst the vertical Y-axis is labelled 'metric'. This is a dark blue solid bar plot. The plot has a label of 'Bacterial'. This plot shows data for transfusion-safety. Specifically the metric 'transfusion-safety_cases_infectionsConfirmed' for the United Kingdom area, along with the age banding of 'all' for the gender group of all. This plot shows data from 01 January 1996 to 01 January 2025. It rose from 1.0 on 01 January 1996 to 6.0 on 01 January 2000. It fell from 5.0 on 01 January 2001 to 1.0 on 01 January 2005. It fell from 2.0 on 01 January 2006 to 0.0 on 01 January 2010. It rose from 0.0 on 01 January 2011 to 1.0 on 01 January 2015. The date fluctuates between 0.0 on 01 January 2016, ending with the same value on 01 January 2020. And finally. The date fluctuates between 0.0 on 01 January 2021, ending with the same value on 01 January 2025. There is no reporting delay period being tracked for the data on this chart. - Refer to tabular data.
Tabular data

Confirmed bacterial transfusion transmitted infections (TTIs), UK data for the number of confirmed bacterial TTIs in the UK, by year of transfusion. Figures are annual, but shown as at January of each year. For example, the figures for 2022 are shown as at "Jan 2022".

Up to and including 1 January 2025

Year of transfusion Bacterial
1 Jan 20250.00
1 Jan 20240.00
1 Jan 20230.00
1 Jan 20220.00
1 Jan 20210.00
1 Jan 20200.00
1 Jan 20190.00
1 Jan 20180.00
1 Jan 20170.00
1 Jan 20160.00
1 Jan 20151.00
1 Jan 20140.00
1 Jan 20130.00
1 Jan 20120.00
1 Jan 20110.00
1 Jan 20100.00
1 Jan 20092.00
1 Jan 20084.00
1 Jan 20072.00
1 Jan 20062.00
1 Jan 20051.00
1 Jan 20040.00
1 Jan 20032.00
1 Jan 20021.00
1 Jan 20015.00
1 Jan 20006.00
1 Jan 19994.00
1 Jan 19983.00
1 Jan 19973.00
1 Jan 19961.00
Download

Download data

Select format

Number of non-bacterial transfusion transmitted infections (TTIs) investigated, UK

The number of suspected non-bacterial TTIs investigated in the UK, by year of transfusion. Figures are annual, but shown as at January of each year. For example, the figures for 2022 are shown as at "Jan 2022".

Up to and including year starting 1 Jan 2025

ChartThere is only 1 plot on this chart. The horizontal X-axis is labelled 'date'. Whilst the vertical Y-axis is labelled 'metric'. This is a turquoise solid line plot. The plot has a label of 'Non-bacterial'. This plot shows data for transfusion-safety. Specifically the metric 'transfusion-safety_testing_investigated' for the United Kingdom area, along with the age banding of 'all' for the gender group of all. This plot shows data from 01 January 1996 to 01 January 2025. It fell from 11.0 on 01 January 1996 to 7.0 on 01 January 2000. It rose from 6.0 on 01 January 2001 to 17.0 on 01 January 2005. It fell from 14.0 on 01 January 2006 to 9.0 on 01 January 2010. It rose from 14.0 on 01 January 2011 to 20.0 on 01 January 2015. It rose from 7.0 on 01 January 2016 to 9.0 on 01 January 2020. And finally. It fell from 8.0 on 01 January 2021 to 4.0 on 01 January 2025. There is no reporting delay period being tracked for the data on this chart. - Refer to tabular data.
Tabular data

Number of non-bacterial transfusion transmitted infections (TTIs) investigated, UK data for the number of suspected non-bacterial TTIs investigated in the UK, by year of transfusion. Figures are annual, but shown as at January of each year. For example, the figures for 2022 are shown as at "Jan 2022".

Up to and including 1 January 2025

Year of transfusion Non-bacterial
1 Jan 20254.00
1 Jan 202410.00
1 Jan 202314.00
1 Jan 202212.00
1 Jan 20218.00
1 Jan 20209.00
1 Jan 20198.00
1 Jan 201813.00
1 Jan 20177.00
1 Jan 20167.00
1 Jan 201520.00
1 Jan 201412.00
1 Jan 201315.00
1 Jan 201212.00
1 Jan 201114.00
1 Jan 20109.00
1 Jan 200917.00
1 Jan 200819.00
1 Jan 200716.00
1 Jan 200614.00
1 Jan 200517.00
1 Jan 200417.00
1 Jan 200320.00
1 Jan 200214.00
1 Jan 20016.00
1 Jan 20007.00
1 Jan 199911.00
1 Jan 19988.00
1 Jan 199714.00
1 Jan 199611.00
Download

Download data

Select format

Confirmed non-bacterial transfusion transmitted infections (TTIs), UK

The number of confirmed non-bacterial TTIs in the UK, by year of transfusion. Figures are annual, but shown as at January of each year. For example, the figures for 2022 are shown as at "Jan 2022".

Up to and including year starting 1 Jan 2025

ChartThere is only 1 plot on this chart. The horizontal X-axis is labelled 'date'. Whilst the vertical Y-axis is labelled 'metric'. This is a turquoise solid bar plot. The plot has a label of 'Non-bacterial'. This plot shows data for transfusion-safety. Specifically the metric 'transfusion-safety_cases_infectionsConfirmed' for the United Kingdom area, along with the age banding of 'all' for the gender group of all. This plot shows data from 01 January 1996 to 01 January 2025. It fell from 5.0 on 01 January 1996 to 2.0 on 01 January 2000. It rose from 0.0 on 01 January 2001 to 2.0 on 01 January 2005. The date fluctuates between 0.0 on 01 January 2006, ending with the same value on 01 January 2010. It rose from 2.0 on 01 January 2011 to 5.0 on 01 January 2015. The date fluctuates between 0.0 on 01 January 2016, ending with the same value on 01 January 2020. And finally. It fell from 1.0 on 01 January 2021 to 0.0 on 01 January 2025. There is no reporting delay period being tracked for the data on this chart. - Refer to tabular data.
Tabular data

Confirmed non-bacterial transfusion transmitted infections (TTIs), UK data for the number of confirmed non-bacterial TTIs in the UK, by year of transfusion. Figures are annual, but shown as at January of each year. For example, the figures for 2022 are shown as at "Jan 2022".

Up to and including 1 January 2025

Year of transfusion Non-bacterial
1 Jan 20250.00
1 Jan 20240.00
1 Jan 20232.00
1 Jan 20220.00
1 Jan 20211.00
1 Jan 20200.00
1 Jan 20191.00
1 Jan 20181.00
1 Jan 20171.00
1 Jan 20160.00
1 Jan 20155.00
1 Jan 20141.00
1 Jan 20130.00
1 Jan 20123.00
1 Jan 20112.00
1 Jan 20100.00
1 Jan 20090.00
1 Jan 20080.00
1 Jan 20070.00
1 Jan 20060.00
1 Jan 20052.00
1 Jan 20041.00
1 Jan 20032.00
1 Jan 20022.00
1 Jan 20010.00
1 Jan 20002.00
1 Jan 19993.00
1 Jan 19981.00
1 Jan 19975.00
1 Jan 19965.00
Download

Download data

Select format

Related content

Learn more about UKHSA data dashboard topics