Two newer COVID-19 variants—NB.1.8.1 (“Nimbus”) and XFG/XFV descendants known as “Stratus”—show how the virus keeps evolving, but current data suggests they don’t cause more severe illness than recent strains. What stands out instead is how easily they spread, with transmission similar to other Omicron-related variants, meaning case numbers can rise quickly even if symptoms stay comparable.

Most symptoms remain familiar and consistent with earlier waves. People commonly report fatigue, cough, congestion, headache, and fever, reflecting patterns seen throughout the pandemic. However, one symptom has drawn more attention lately: a very painful sore throat, sometimes described as feeling like “razor blades.” While this isn’t unique to these variants, it appears more frequently in recent infections.

Risk levels haven’t changed significantly. Older adults, people with chronic health conditions, and those with weakened immune systems are still the most vulnerable to complications. For these groups especially, even a mild infection can become more serious.

To track the spread, health experts continue relying on wastewater monitoring, which can detect rising infection trends early—often before testing data shows an increase. This helps authorities respond faster to potential surges.

Even when symptoms seem mild, doctors emphasize caution. Resting, staying home, and limiting contact with others remain key steps to reduce transmission. If symptoms worsen, last longer than expected, or become severe, seeking medical advice is important. Staying careful and aware is still the best approach as the virus continues to change.