Collection Advice on coronavirus from the Technical Advisory Cell Information to help ministers respond in the best interests of the Welsh population to the COVID-19 pandemic. Part of: Infections and Strategy and evidence: coronavirus Organisation: Technical Advisory Cell First published: 8 May 2020 Last updated: 12 May 2022 In this collection Review cycles Summary of advice Modelling updates Wastewater Subject specific reports Review cycles Advice from the Technical Advisory Cell and Chief Scientific Advisor for Health: 21 day review 27 April 2022 6 May 2022 Report Advice from the Technical Advisory Cell and Chief Scientific Advisor for Health: 21 day review 7 April 2022 28 April 2022 Report Advice from the Technical Advisory Cell and Chief Scientific Advisor for Health: 21 day review 21 March 2022 25 March 2022 Report Advice from the Technical Advisory Cell and Chief Scientific Advisor for Health: 21 day review 24 February 2022 4 March 2022 Report Advice from the Technical Advisory Cell and Chief Scientific Advisor for Health: 21 day review 4 February 2022 14 February 2022 Report Advice from the Technical Advisory Cell and Chief Scientific Advisor for Health: 21 day review: 13 January 2022 14 January 2022 Report Technical Advisory Group: advice to Cabinet for the weekly COVID-19 review 15 December 15 December 2021 Report Advice from the Technical Advisory Cell and Chief Scientific Advisor for Health: 21 day review 2 December 2 December 2021 Report Advice from the Technical Advisory Cell and Chief Scientific Advisor for Health: 21 day review 11 November 11 November 2021 Report Advice from Technical Advisory Cell and Chief Scientific Advisor for Health: 21 day 28 October 5 November 2021 Report Advice from the Technical Advisory Cell and Chief Scientific Advisor for Health: 21 day review 7 October 18 October 2021 Report Technical Advisory Cell: advice from TAG for the 17 September restriction review 17 September 2021 Report Technical Advisory Group: advice for 5 August restriction review 16 August 2021 Report Technical Advisory Group: advice for 15 July restriction review 16 July 2021 Report Technical Advisory Group: advice from TAG and the Chief Scientific Advisor for Health on the Delta Variant 19 June 2021 Report Technical Advisory Group: advice for 3 June restriction review 18 June 2021 Report Advice from the Technical Advisory Group and the Chief Scientific Advisor for Health: 13 May 2021 review 14 May 2021 Report Technical Advisory Group: advice for 22 April restriction review 23 April 2021 Report Technical Advisory Cell: advice for 31 March Restriction Review 9 April 2021 Report Technical Advisory Group: fire breaks 19 October 2020 Report Summary of advice Technical Advisory Cell: summary of advice 6 May 2022 12 May 2022 Report Technical Advisory Cell: summary of advice 1 April 2022 5 April 2022 Report Technical Advisory Cell: summary of advice 4 March 2022 9 March 2022 Report Technical Advisory Cell: summary of advice 10 February 2022 14 February 2022 Report Technical Advisory Cell: summary of advice 21 January 2022 1 February 2022 Report Technical Advisory Cell: summary of advice 7 January 2022 11 January 2022 Report Technical Advisory Cell: summary of advice 10 December 2021 13 December 2021 Report Technical Advisory Cell: summary of advice 19 November 2021 23 November 2021 Report Technical Advisory Cell: summary of advice 5 November 2021 8 November 2021 Report Technical Advisory Cell: summary of advice 15 October 2021 19 October 2021 Report Technical Advisory Cell: summary of advice 24 September 2021 5 October 2021 Report Technical Advisory Cell: summary of advice 10 September 2021 20 September 2021 Report Technical Advisory Cell: summary of advice 6 August 2021 16 August 2021 Report Technical Advisory Cell: summary of advice 23 July 2021 30 July 2021 Report Technical Advisory Cell: summary of advice 15 July 2021 16 July 2021 Report Technical Advisory Cell: summary of advice 2 July 2021 13 July 2021 Report Technical Advisory Cell: summary of advice 22 June 2021 24 June 2021 Report Technical Advisory Cell: summary of advice 8 June 2021 14 June 2021 Report Technical Advisory Cell: summary of advice 1 June 2021 7 June 2021 Report Technical Advisory Cell: summary of advice 21 May 2021 28 May 2021 Report Technical Advisory Cell: summary of advice 14 May 2021 21 May 2021 Report Technical Advisory Cell: summary of advice 7 May 2021 13 May 2021 Report Technical Advisory Cell: summary of advice 30 April 2021 7 May 2021 Report Technical Advisory Cell: summary of advice 23 April 2021 28 April 2021 Report Technical Advisory Cell: summary of advice 16 April 2021 20 April 2021 Report Technical Advisory Cell: summary of advice 9 April 2021 15 April 2021 Report Technical Advisory Cell: summary of advice 2 April 2021 9 April 2021 Report Technical Advisory Cell: summary of advice 26 March 2021 31 March 2021 Report Technical Advisory Cell: summary of advice 19 March 2021 24 March 2021 Report Technical Advisory Cell: summary of advice 12 March 2021 18 March 2021 Report Technical Advisory Cell: summary of advice 9 March 2021 12 March 2021 Report Technical Advisory Cell: summary of advice 3 March 2021 5 March 2021 Report Technical Advisory Cell: summary of advice 22 February 2021 26 February 2021 Report Technical Advisory Cell: summary of advice 15 February 2021 24 February 2021 Report Technical Advisory Cell: summary of advice 7 February 2021 11 February 2021 Report Technical Advisory Cell: summary of advice 29 January 2021 5 February 2021 Report Technical Advisory Cell: summary of advice 22 January 2021 29 January 2021 Report Technical Advisory Cell: summary of advice 15 January 2021 21 January 2021 Report Technical Advisory Cell: summary of advice 8 January 2021 14 January 2021 Report Technical Advisory Cell: summary of advice 23 December 2020 24 December 2020 Report Technical Advisory Cell: summary of advice 11 December 2020 16 December 2020 Report Technical Advisory Cell: summary of advice 4 December 2020 10 December 2020 Report Technical Advisory Cell: summary of advice 27 November 2020 2 December 2020 Report Technical Advisory Cell: summary of advice 20 November 2020 26 November 2020 Report Technical Advisory Cell: summary of advice 13 November 2020 19 November 2020 Report Technical Advisory Cell: summary of advice 6 November 2020 12 November 2020 Report Technical Advisory Cell: summary of advice 30 October 2020 6 November 2020 Report Technical Advisory Cell: summary of advice 23 October 2020 29 October 2020 Report Technical Advisory Cell: summary of advice 16 October 2020 26 October 2020 Report Technical Advisory Cell: summary of advice 9 October 2020 14 October 2020 Report Technical Advisory Cell: summary of advice 2 October 2020 6 October 2020 Report Technical Advisory Cell: summary of advice 25 September 2020 29 September 2020 Report Technical Advisory Cell: summary of advice 18 September 2020 22 September 2020 Report Technical Advisory Cell: summary of advice 11 September 2020 15 September 2020 Report Technical Advisory Cell: summary of advice 4 September 2020 8 September 2020 Report Technical Advisory Cell: summary of advice 28 August 2020 2 September 2020 Report Technical Advisory Cell: summary of advice 21 August 2020 25 August 2020 Report Technical Advisory Cell: summary of advice 14 August 2020 18 August 2020 Report Technical Advisory Cell: summary of advice 7 August 2020 11 August 2020 Report Technical Advisory Cell: summary of advice 31 July 2020 4 August 2020 Report Technical Advisory Cell: summary of advice 24 July 2020 28 July 2020 Report Technical Advisory Cell: summary of advice 17 July 2020 21 July 2020 Report Technical Advisory Cell: summary of advice 10 July 2020 14 July 2020 Report Technical Advisory Cell: summary of advice 5 July 2020 9 July 2020 Report Technical Advisory Cell: summary of advice 26 June 2020 1 July 2020 Report Technical Advisory Cell: summary of advice 19 June 2020 25 June 2020 Report Technical Advisory Cell: summary of advice 12 June 2020 22 June 2020 Report Technical Advisory Cell: summary of advice 5 June 2020 9 June 2020 Report Technical Advisory Cell: summary of advice 28 May 2020 4 June 2020 Report Technical Advisory Cell: summary of advice 19 May 2020 29 May 2020 Report Technical Advisory Cell: summary of advice 12 May 2020 19 May 2020 Report Technical Advisory Cell: summary of advice 5 May 2020 14 May 2020 Report Modelling updates Technical Advisory Group: policy modelling update 11 February 2022 9 March 2022 Report Technical Advisory Group: winter modelling update February 2022 9 March 2022 Report Technical Advisory Group: policy modelling update 11 January 2022 14 January 2022 Report Technical Advisory Group: policy modelling update 17 December 2021 17 December 2021 Report Technical Advisory Group: policy modelling update 30 November 30 November 2021 Report Technical Advisory Group: policy modelling update 14 October 2021 26 October 2021 Report Technical Advisory Group: policy modelling update 24 September 2021 12 October 2021 Report Technical Advisory Group: winter modelling update 10 September 2021 29 September 2021 Report Technical Advisory Group: policy modelling update 12 July 2021 13 July 2021 Report Technical Advisory Group: policy modelling update 25 June 2021 28 June 2021 Report Technical Advisory Group: policy modelling update 5 May 2021 14 May 2021 Report Technical Advisory Group: modelling the current Welsh Test, Trace, Protect system 24 March 2021 Report Technical Advisory Cell modelling update: 12 February 2021 11 March 2021 Report Technical Advisory Group Policy Modelling: December 2020 and January 2021 18 December 2020 Report Technical Advisory Cell modelling update: 26 May 2020 26 May 2020 Report Technical Advisory Cell modelling update: 7 May 2020 8 May 2020 Report Wastewater Wastewater monitoring: 7 April 2022 11 April 2022 Report Wastewater monitoring: 31 March 2022 4 April 2022 Report Wastewater monitoring: 24 March 2022 28 March 2022 Report Wastewater monitoring: 17 March 2022 21 March 2022 Report Wastewater monitoring: 10 March 2022 14 March 2022 Report Wastewater monitoring: 3 March 2022 7 March 2022 Report Wastewater monitoring: 24 February 2022 28 February 2022 Report Wastewater monitoring: 17 February 2022 21 February 2022 Report Subject specific reports Technical Advisory Group: examining deaths in Wales associated with COVID-19 30 March 2022 30 March 2022 Report Technical Advisory Group: Consensus statement on face masks for the public 28 March 2022 Report Technical Advisory Group: Living safely with COVID-19 in Wales: risk communication and behavioural science perspectives 25 March 2022 Report Technical Advisory Group: reducing COVID-19 transmission in schools and colleges: the role of air cleaning devices amongst other mitigations 31 January 2022 Report Technical Advisory Group: reduction in isolation period supported by lateral flow testing for cases of COVID-19 31 January 2022 Report Technical Advisory Group: the impact in Wales of the COVID-19 ‘false negative’ PCR tests reported during September/October 2021 31 January 2022 Report Technical Advisory Group: COVID-19 hospital admissions 24 January 2022 Report Updated advice from the Technical Advisory Group and Chief Scientific Advisor for Health on the evidence for the use of COVID Passes 2 December 2021 Report Technical Advisory Group: COVID-19 waning immunity 10 November 2021 Report Technical Advisory Group: evidence review of ozone generators including appropriateness as mitigation in classrooms 14 October 2021 Report Technical Advisory Group: what is the social value of a covid case and how has it changed? 29 September 2021 Report Technical Advisory Group: advice on vaccine passports 17 September 2021 Report Technical Advisory Group: modelling the Impact of Test, Trace, Protect (TTP) on COVID-19 transmissions in Wales 24 August 2021 Report Technical Advisory Group: sustaining COVID-safe behaviours in Wales 13 August 2021 Report Technical Advisory Group: COVID-19 population immunity estimates in Wales 9 August 2021 Report Technical Advisory Group: moral injury in health care workers during the COVID-19 pandemic 3 August 2021 Report Technical Advisory Group: 5 harms arising from COVID-19 16 July 2021 Report Technical Advisory Cell: changes to the alert level control plan indicators 16 July 2021 Report Technical Advisory Group: advice for nightclubs and adult entertainment venues 16 July 2021 Report Technical Advisory Group: review advice on communal singing and chanting, including wind instruments and pipe organs 1 July 2021 Report Technical Advisory Group: plastic screens in taxis and private hire vehicles 23 June 2021 Report Technical Advisory Group: use of face coverings in childcare and educational settings for Under 18s 19 June 2021 Report Technical Advisory Group: briefing on variant of concern B.1.617.2 28 May 2021 Report Technical Advisory Group: using SARS-CoV-2 antibody testing in a diagnostic setting 11 May 2021 Report Technical Advisory Group: the potential risks and benefits of removing restrictions in a phased approach to mitigate the impact of harms from COVID-19 in Wales 8 April 2021 Report Technical Advisory Group: statement on priority considerations relating to personal protective behaviours to inform decisions on easing of restrictions in Spring 2021 8 April 2021 Report Technical Advisory Group: COVID-19 evidence associated with transmission and potential risks associated with religious activities and places of worship 23 April 2021 Report Technical Advisory Group: examining deaths in Wales associated with COVID-19 24 March 2021 24 March 2021 Report Technical Advisory Group: high-level findings of clotting in Wales and COVID-19 vaccination 22 March 2021 Report Technical Advisory Group: mitigating risks of increased COVID-19 transmission during elections 19 March 2021 Report Technical Advisory Group: SARS-CoV-2 transmission risk in public toilets 18 March 2021 Report Technical Advisory Group: current evidence relating to weddings 18 February 2021 Report Technical Advisory Group: consensus statement on testing in the context of vaccination associated with care homes 8 February 2021 Report Technical Advisory Group: considerations for changing the operation of schools to allow more face-to-face learning 5 February 2021 Report Technical Advisory Group: air cleaning devices 3 February 2021 Report Technical Advisory Group: Long-COVID 3 February 2021 Report Technical Advisory Group: Surveillance approaches to determine the risk, frequency and origin of SARS-CoV-2 entry into UK airports 3 February 2021 Report Technical Advisory Group: using behavioural science to inform policy and practice 1 February 2021 Report Technical Advisory Group: SARS-CoV-2 infection risks at indoor exercise facilities 18 January 2021 Report Technical Advisory Group: variant of concern and education in Wales 28 January 2021 Report Technical Advisory Group: Brief on the viral variant VOC-202012/01 24 December 2020 Report Technical Advisory Group: updated consensus statement on recommended testing criteria for discharge of asymptomatic patients to care homes 15 December 2020 Report Technical Advisory Group: briefing paper on the infectivity of COVID-19 11 December 2020 Report Technical Advisory Group: statement regarding non-pharmaceutical interventions in the pre-Christmas period 7 December 2020 Report Technical Advisory Group: swimming pools, hot tubs, saunas and steam rooms and risk from COVID-19 7 December 2020 Report Technical Advisory Group: effectiveness of non-pharmaceutical interventions in the Local Health Protection Zones and the Firebreak in Wales 3 December 2020 Report Technical Advisory Group: summary of evidence on costs and benefits and potential mitigations for measures to address COVID-19 in Wales 3 December 2020 Report Technical Advisory Group: SARS-CoV-2 infection risks at ice rinks 19 November 2020 Report Technical Advisory Group: evidence review on children and young people under 18 in preschool, school or college following the firebreak 13 November 2020 Report Technical Advisory Group: behavioural insights to support a post fire break Wales 9 November 2020 Report Technical Advisory Group: guidance for assessing the potential for new technologies to improve SARS-CoV-2 diagnostic testing 22 October 2020 Report Technical Advisory Group: consensus statement on use-cases for near patient and point-of-care tests for detecting SARS-CoV-2 viral RNA or antigens 21 October 2020 Report Technical Advisory Cell: coronavirus (COVID-19) and health inequalities 19 October 2020 Report Genomic analysis of Covid-19 lineages in Wales 14 October 2020 Report Technical Advisory Group: review of data and monitoring to support childcare, schools and FE operations up to age 18 9 October 2020 Report Technical Advisory Group: behavioural insights for contact tracing systems and young people 1 October 2020 Report Technical Advisory Group: new reasonable worst case scenario for Winter 18 September 2020 Report Technical Advisory Group: statement on testing travellers returning to Wales from areas of high prevalence 11 September 2020 Report Technical Advisory Group: statement on single vs double testing patients 9 September 2020 Report Technical Advisory Group: face coverings for children and young people in education settings 26 August 2020 Report Technical Advisory Group: updated advice on face coverings 14 August 2020 Report Technical Advisory Group: testing criteria for discharging asymptomatic patients to care homes 12 August 2020 Report Technical Advisory Group: advice on school transport 11 August 2020 Report Post-mortem testing: consensus statement 23 July 2020 Report Technical Advisory Group: examining deaths in Wales associated with COVID-19 17 July 2020 Report Technical Advisory Group: repeat antibody testing of school staff 15 July 2020 Report Technical Advisory Group: use of tests to detect antibody to SARS-CoV-2 antigens 15 July 2020 Report Technical Advisory Cell: Principles for using RT-PCR test to detect SARS-CoV-2 15 July 2020 Report Technical Advisory Cell: seasonal effects on COVID-19 in South America 14 July 2020 Report COVID-19 circuit breakers and early warning indicators 13 July 2020 Report Technical Advisory Group: advice on return to school 16 July 2020 Report Technical Advisory Cell: Impact of European measures to ease lockdown restrictions on R values summary briefing 16 June 2020 Report Technical Advisory Cell: use of face coverings in the context of COVID-19 9 June 2020 Report Our latest understanding of COVID-19 with respect to children and education 3 June 2020 Report Testing for COVID-19 in care homes: consensus statement 19 May 2020 Report