https://www.profitableratecpm.com/f4ffsdxe?key=39b1ebce72f3758345b2155c98e6709c
Proceedings of the National Academy of Sciences, Volume 122, Issue 39, September 2025. <br/>SignificanceA mutant spectrum shrinkage of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) was observed as the COVID-19 pandemic advanced. This suggests that virus from late COVID-19 waves has fewer alternative mutational pathways available …
