Pre-February-2020 SARS-CoV-2 genomes comprise two distinct lineages, designated A and B, separated by two nucleotide differences.

The two-lineage, two-nucleotide structure is untouched by the erratum and undisputed (COV-E010, COV-E012). Several hundred early Chinese sequences remain unpublished (COV-E022), so the diversity picture is incomplete by construction.

Unaffected by the erratum and undisputed (COV-E010). Several hundred early Chinese sequences remain unpublished (COV-E022), so the diversity picture is incomplete by construction.

Unaffected by the erratum and uncontested (COV-E010, COV-E012). Several hundred early Chinese sequences remain unpublished (COV-E022), so the diversity picture is incomplete by construction.

Pre-February 2020 genome sequences exhibit a clear division into two distinct lineages (A and B) separated by only two nucleotide differences. This fundamental genomic observation is unchallenged by either side and serves as the baseline for modeling viral introduction. The strongest opposing consideration is that the dataset is incomplete by construction, as several hundred early Chinese sequences remain withheld, potentially concealing intermediate genomes.

Genomic analysis consistently identifies early pre-February-2020 SARS-CoV-2 genomes partitioning into two distinct lineages separated by two nucleotide substitutions. This structural observation is robust, undisputed, and fundamental to downstream phylogenetic modeling. The primary limitation is that several hundred early Chinese sequences remain withheld, meaning the observed basal diversity is structurally incomplete by design.

Published phylogenetic analyses universally agree that the pre-February 2020 viral genomes partition cleanly into two distinct lineages, A and B. It is undisputed that these lineages are separated by two nucleotide differences. The strongest opposing consideration is that several hundred early Chinese genomic sequences remain deliberately withheld, meaning the observed lineage structure is incomplete by design.

COV-E010 from Pekar et al. clearly describes two early lineages, A and B, separated by two specific nucleotide substitutions that also appear in related bat coronaviruses, and no evidence in the dossier disputes this basic structure. The only limitation is that additional early genomes from unpublished Chinese sequences could later refine this picture, but that does not undercut the observation as currently defined.

Pekar et al. clearly state that pre‑February‑2020 genomes fall into two basal lineages, A and B, differing at two specific nucleotide positions that are also found in bat sarbecoviruses (COV-E010), and no evidence record disputes this descriptive fact. The main caveat is that many early Chinese sequences remain unpublished, so finer structure could exist, but that does not affect the existence of the A/B distinction.

The Pekar molecular epidemiology paper explicitly describes two early lineages, A and B, differing at two nucleotide positions that are themselves found in bat sarbecoviruses, and no source disputes this basic pattern. The main caveat is that hundreds of early Chinese sequences remain unpublished, so additional genomes could reveal intermediate haplotypes and refine this simple two‑lineage picture.

Pekar 2022 states that lineage A differs from lineage B by two nucleotide substitutions, C8782T and T28144C, both also found in related Rhinolophus bat coronaviruses, and the 2023 erratum did not touch this observation. The two-lineage structure of the early public genome set is not in serious dispute. The strongest opposing consideration is that several hundred early Chinese sequences remain unpublished, so the early-diversity picture is incomplete by construction and intermediate genomes could still change the apparent partition.

Pekar et al. state that lineage A differs from lineage B by two nucleotide substitutions, C8782T and T28144C, both also found in related Rhinolophus bat coronaviruses, and the later erratum does not touch that observation. Nobody in the record disputes the two-lineage structure of the available early genomes. The inference from that structure is a separate claim. Strongest opposing consideration: several hundred early Chinese sequences remain unpublished, so intermediate genomes that would change the apparent lineage partition could still exist in withheld data.

The published lineage analysis, unchanged by its later erratum, states that lineage A differs from lineage B by two nucleotide substitutions, both also found in related bat coronaviruses, and that observation is not in dispute. The inference from the two-lineage pattern is a separate claim; the existence of the two lineages in the available early genomes is not. The strongest opposing consideration is that several hundred early Chinese sequences remain unpublished, so the early-diversity picture is incomplete by construction and intermediate genomes could still change the apparent structure.

The two-lineage structure separated by two nucleotide differences is stated in the published analysis, survived the paper's erratum untouched, and is not disputed by any party to the debate; both substitutions also occur in related bat coronaviruses. The observation carries almost no weight of its own — the inference built on it is graded separately. The strongest opposing consideration is that several hundred early Chinese sequences remain unpublished, so the early-diversity picture is incomplete by construction and the lineage structure could be reshaped by data the custodian holds. As a statement about currently published genomes, the claim stands.

The two-lineage structure separated by two nucleotide differences is stated in the published analysis, unchanged by the erratum, uncontested by any party in the record, and both substitutions occur in related bat coronaviruses. The strongest opposing consideration is structural: several hundred early Chinese sequences remain unpublished, so the observed lineage picture is incomplete by construction, and withheld intermediate genomes could restructure it. That caveat keeps a directly observed but potentially unrepresentative pattern at well_supported rather than established; everything inferential is correctly quarantined in C010.

The two-lineage structure separated by two nucleotide differences is published, undisputed by any record provided, and unchanged by the later erratum. The strongest opposing consideration is that several hundred early Chinese sequences remain unpublished, so the picture is incomplete by construction and intermediate genomes could alter the structure. That caveat conditions the inference built on this observation (graded separately at COV-C010), not the observation itself. Well supported.

The two-lineage structure and the two distinguishing nucleotide sites are stated in the published analysis, unchanged by its erratum, and disputed by no party. The sites are also present in related bat coronaviruses, which is reported in the same source. The strongest opposing consideration is completeness rather than accuracy: several hundred early Chinese sequences remain unpublished, so the early-diversity picture is partial by construction and could in principle contain intermediate genomes that change the structure. That bears on the inference graded at C010, not on the observation.

The two-lineage structure separated by C8782T and T28144C is a direct reading of public sequence data, unchanged by the parent paper's erratum, and is not disputed by any party in this record. The strongest opposing consideration is that several hundred early Chinese sequences remain unpublished, so the early-diversity picture is incomplete by construction. But intermediates, if released, would bear on what the structure implies (COV-C010), not on whether lineages A and B exist and differ at two sites. This is bedrock observation with essentially no interpretive load.

The two-lineage structure and the two defining substitutions (C8782T, T28144C) are directly checkable in public sequence data, are stated in the published analysis, and survived the paper's substantive erratum untouched; no party to the dispute contests them. The strongest opposing consideration is that several hundred early Chinese sequences remain unpublished, so the early-diversity picture is incomplete by construction — but incompleteness would affect what the structure implies, not whether the observed lineages differ as described. This is an observation with essentially no discriminating power on its own.

Unchanged by the paper's erratum; not in dispute. Several hundred early sequences remain unpublished, so the picture is incomplete by construction.

Unchanged by the erratum and not disputed by any seat (COV-E010). Several hundred early Chinese sequences remain unpublished (COV-E022), so the diversity picture is incomplete by construction.