The COVID Advisor

Overview A new COVID-19 variant, identified as NB.1.8.1, has recently emerged and is drawing international attention due to its increasing prevalence, particularly in China, and its detection in the United States and other countries. 1. Emergence and Spread of NB.1.8.1 Origin and Detection: NB.1.8.1 was first identified as a significant driver of rising COVID-19 cases in China. The U.S. Centers for Disease Control and Prevention (CDC) confirmed its presence in the United States, though as of late May 2025, fewer than 20 cases had been reported domestically. Global Spread: The World Health Organization (WHO) and multiple health authorities have noted that NB.1.8.1 is now spreading worldwide, with cases reported in several countries. Its rapid dissemination has raised concerns about potential increases in COVID-19 cases in various regions. 2. Variant Characteristics Genetic Profile: NB.1.8.1 is a subvariant of the Omicron lineage, featuring several mutations in the spike protein. These m...

Long COVID continues to affect millions worldwide in 2025, with ongoing research shedding new light on its causes, symptoms, and potential treatments. This article summarizes the most recent scientific findings and clinical advances to help patients and healthcare providers better understand and manage this complex condition. Latest Research Insights on Long COVID Immune System Markers and Genetic Risk Factors A recent clinical study led by Cardiff Metropolitan University and Cwm Taf Morgannwg University Health Board identified elevated levels of the immune protein Interleukin-6 (IL-6) in people suffering from Long COVID compared to those who fully recovered 1 .  The study also found that individuals with a particular IL-6 receptor genotype, known as the ‘AA’ genotype, have an increased risk of developing Long COVID. These findings suggest IL-6 and its receptor could serve as biomarkers to predict risk and guide future treatments. Large-Scale Data from Electronic Health Records (EH...