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Dewis pwnc arall neu clirio pob hidlydd.
Nid yw holl gynnwys y cyfrifia wedi'i ryddhau. Edrychwch am ddatganiadau sydd i ddod ar y calendr datganiadau. Fel arall, gallwch greu set ddata eich fun.
Rhyddhawyd ar: 28 September 2021 | Setiau data
Initial estimates of prevalence of ongoing symptoms following coronavirus (COVID-19) infection in staff and pupils from the COVID-19 Schools Infection Survey across a sample of schools, within selected local authority areas in England. This Schools Infection Survey is jointly led by the London School of Hygiene & Tropical Medicine, Public Health England and the Office for National Statistics.
Rhyddhawyd ar: 2 May 2025 | Data a gyrchwyd gan y defnyddiwr
Rhyddhawyd ar: 10 November 2016 | Data a gyrchwyd gan y defnyddiwr
Rhyddhawyd ar: 16 June 2016 | Data a gyrchwyd gan y defnyddiwr
Rhyddhawyd ar: 1 February 2022 | Erthygl
Rhyddhawyd ar: 11 May 2026 | Data a gyrchwyd gan y defnyddiwr
Rhyddhawyd ar: 8 April 2025 | Data a gyrchwyd gan y defnyddiwr
Rhyddhawyd ar: 27 October 2021 | Erthygl
Rhyddhawyd ar: 24 April 2026 | Data a gyrchwyd gan y defnyddiwr
Rhyddhawyd ar: 24 March 2020 | Data a gyrchwyd gan y defnyddiwr
