The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.
SARS-CoV-2 B.1.1.529 (Omicron) Variant — United States, December 1–8, 2021
Open accessAbstract
A new variant of SARS-CoV-2 (the virus that causes COVID-19), B.1.1.529 (Omicron) (1), was first reported to the World Health Organization (WHO) by South Africa on November 24, 2021. Omicron has numerous mutations with potential to increase transmissibility, confer resistance to therapeutics, or partially escape infection- or vaccine-induced immunity (2). On November 26, WHO designated B.1.1.529 as a variant of concern (3), as did the U.S. SARS-CoV-2 Interagency Group (SIG)* on November 30. On December 1, the first case of COVID-19 attributed to the Omicron variant was reported in the United States. As of December 8, a total of 22 states had identified at least one Omicron variant case, including some that indicate community transmission. Among 43 cases with initial follow-up, one hospitalization and no deaths were reported. This report summarizes U.S. surveillance for SARS-CoV-2 variants, characteristics of the initial persons investigated with COVID-19 attributed to the Omicron variant and public health measures implemented to slow the spread of Omicron in the United States. Implementation of concurrent prevention strategies, including vaccination, masking, increasing ventilation, testing, quarantine, and isolation, are recommended to slow transmission of SARS-CoV-2, including variants such as Omicron, and to protect against severe illness and death from COVID-19.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Assignment of epidemiological lineages in an emerging pandemic using the pangolin tool
O’Toole, Á., Scher, E., Underwood, A., Jackson, B., Hill, V., McCrone, J. T., Colquhoun, R., Ruis, C., Abu-Dahab, K., Taylor, B., et al. (2021) · Virus Evolution · doi:10.1093/ve/veab064 · Cited by 1,077
NATIONAL INSTITUTE OF COMMUNICABLE DISEASES
Smith, C. E. G., & Fairweather, D. V. I. (1988) · The Lancet · doi:10.1016/s0140-6736(88)92052-1 · Cited by 384
Johansson, M. A., Wolford, H. M., Paul, P., Diaz, P. S., Chen, T.-H., Brown, C. M., Cetron, M. S., & Alvarado‐Ramy, F. (2021) · BMC Medicine · doi:10.1186/s12916-021-01975-w · Cited by 56
Cited by
Accorsi, E. K., Britton, A., Fleming-Dutra, K. E., Smith, Z. R., Shang, N., Derado, G., Miller, J., Schrag, S. J., & Verani, J. R. (2022) · JAMA · doi:10.1001/jama.2022.0470 · Cited by 628
Johnson, A. G., Amin, A. B., Ali, A. R., Hoots, B., Cadwell, B. L., Arora, S., Avoundjian, T., Awofeso, A. O., Barnes, J., Bayoumi, N. S., et al. (2022) · MMWR. Morbidity and Mortality Weekly Report · doi:10.15585/mmwr.mm7104e2 · Cited by 359
Welch, N. L., Zhu, M., Hua, C., Weller, J., Mirhashemi, M. E., Nguyen, T. G., Mantena, S., Bauer, M. R., Shaw, B. M., Ackerman, C. M., et al. (2022) · Nature Medicine · doi:10.1038/s41591-022-01734-1 · Cited by 304
Hinson, J. S., Klein, E., Smith, A., Toerper, M., Dungarani, T., Hager, D., Hill, P., Kelen, G., Niforatos, J. D., Stephens, R. S., et al. (2022) · npj Digital Medicine · doi:10.1038/s41746-022-00646-1 · Cited by 30
Metadata
- Authors
- CDC COVID-19 Response Team
- Venue
- MMWR. Morbidity and Mortality Weekly Report
- Published
- 2021-12-17
- Volume
- 70
- Issue
- 50
- Pages
- 1731-1734
- ISSN
- 0149-2195 (ISSN-L)
- 1545-861X
- OpenAlex
- W4200340523
- Cited by
- 299
- References
- 3
- FWCI
- 20.51
- Type
- journal article
- Language
- en
- Open access
- diamond
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: SARS-CoV-2 B.1.1.529 (Omicron) Variant — United States, December 1–8, 2021. https://app.cochat.ai/papers/10.15585/mmwr.mm7050e1
- The paper
- CDC COVID-19 Response Team. (2021). SARS-CoV-2 B.1.1.529 (Omicron) Variant — United States, December 1–8, 2021. MMWR. Morbidity and Mortality Weekly Report. https://doi.org/10.15585/mmwr.mm7050e1
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
