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Volume 28, Supplement—December 2022
SUPPLEMENT ISSUE
Surveillance

Determining Gaps in Publicly Shared SARS-CoV-2 Genomic Surveillance Data by Analysis of Global Submissions

Elizabeth C. OhlsenComments to Author , Anthony W. Hawksworth, Kimberly Wong, Sarah Anne J. Guagliardo, James A. Fuller, Michelle L. Sloan, and Kevin O’Laughlin
Author affiliation: Centers for Disease Control and Prevention, Atlanta, Georgia, USA

Main Article

Table 3

Geographic distribution of Alpha, Delta, and Omicron SARS-CoV-2 sequences before dates of selected international public health actions, based on data from GISAID and GenBank, 2020–2021*

Variant International action (date implemented) Sequences collected before that date Geographic diversity of origin Sequences submitted before that date (% of total collected) Geographic diversity of origin
Alpha
 International travel restrictions (14) (2020 Dec 19)†
 11,586
 48 countries (5 continents)
 1,872 (16)
 4 countries (2 continents)
Delta
 WHO-designated VOC (2) (2021 May 11)
 28,257
 116 countries (6 continents)
 2,257 (8.0)
 39 countries (5 continents)
Delta
 CDC-designated VOC (15) (2021 Jun 15)‡
 121,071
 137 countries (6 continents)
 46,946 (39)
 66 countries (6 continents)
Omicron WHO-designated VOC (2); international travel restrictions (16) (2021 Nov 26) 1,365 48 countries (6 continents) 76 (5.6) 3 countries (2 continents)

*CDC, United States Centers for Disease Control and Prevention; GISAID, https://www.gisaid.org; VOC, variant of concern. WHO, World Health Organization. †WHO designated Alpha a variant of concern on December 18, 2020 (2). ‡Several countries implemented (Germany, Hong Kong, Lithuania, Slovakia, Belgium) or extended (United States) travel restrictions due to Delta during June or July 2021.

Main Article

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