This nationwide registry data study from Norway assesses the secondary attack rate of SARS-CoV-2 variants Delta and Omicron in an effort to estimate the transmissibility of the Omicron variant.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8902690 | PMC |
| http://dx.doi.org/10.1001/jama.2022.3780 | DOI Listing |
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