march 2021 Variants of concern or under investigation: data up to 3 March 2021 Differences between a Variant of Concern and a Variant Under Investigation SARS-CoV-2 variants, if considered to have concerning epidemiological, immunological or pathogenic properties, are raised for formal investigation. At this point they are designated Variant Under Investigation (VUI) with a year, month, and number. Following a risk assessment with the relevant expert committee, they may be designated Variant of Concern (VOC).

sept 2021 SARS-CoV-2 variants of concern and variants under investigation in England Technical briefing 23 17 September 2021 This briefing provides an update on previous briefings up to 3 September 2021