The reconstruction of hCoV-19 (SARS-CoV-2) evolutionary history through phylogenetic methods is now indispensable in genomic surveillance, clarifying how lineages emerge and propagate. Centering the phylogenetic reconstruction on Algeria enables detailed regional insight without losing connection to international viral diversity. This reconstruction spans the entire temporal arc of the pandemic, beginning with the earliest detections in 2020 and extending to the most recently generated genomes. Through integration of time-resolved sequence information, the analysis captures both enduring evolutionary trajectories and short-term lineage expansions, thereby illustrating shifts in hCoV-19 diversity across successive epidemic waves.
The terminal branches of the phylogeny are largely composed of JN.1* genomes derived from recent sequencing efforts in Algeria. These genomes form well-defined clusters near the tips of the phylogeny, consistent with their recent emergence and active transmission. The branching configuration documents mutation accumulation through time and supports molecular clock-based estimation of divergence events, which is crucial for interpreting lineage replacement, persistence, and regional dissemination patterns.
The comparative genomic landscape linked to Algeria shows stronger representation from Oran and Tebessa in the last submitted genomes to GISAID. Although the phylogenetic tree emphasizes Algeria, it deliberately incorporates a curated subset of genomes from other continents. These external references serve to identify introductions, export events, and shared ancestry relationships, while maintaining the analytical focus on Algeria.
A phylogenetic perspective centered on Algeria strengthens the bridge between molecular evolution and applied epidemiology. By aligning genomic evolution with geographic and temporal structure, such analyses contextualize viral diversity within the global pandemic system. Continued sequencing and integration of emerging lineages ensure that phylogenetic monitoring remains essential for tracking hCoV-19 (SARS-CoV-2) evolution and informing evidence-based public health responses tailored to Algeria.
