New Covid variant NB.1.8.1 detected at US airports amid rise in cases. Check for symptoms and preventive measures

A new Covid variant, NB.1.8.1, is detected in US airports. The variant is driving a surge in cases across China. Cases are identified in California, Washington, Virginia, and New York. The WHO designates it as a Variant Under Monitoring. Symptoms are similar to previous Omicron variants. Vaccination and masking are recommended. Health officials are closely monitoring the situation.