Two newer COVID-19 variants—NB.1.8.1 (“Nimbus”) and XFG/XFV descendants often referred to as “Stratus”—are part of the ongoing evolution of COVID-19. Health officials continue to monitor them, but so far there’s no clear evidence they cause more severe illness than recent variants.

What stands out is how easily they spread. Like other Omicron-related strains, they appear to transmit efficiently, which can lead to spikes in cases even if severity remains similar.

Symptoms are still largely familiar. Most people report fatigue, cough, congestion, headache, and fever—typical signs seen throughout the pandemic.

One symptom getting extra attention is a particularly painful sore throat, sometimes described as feeling like “razor blades.” While not unique to these variants, it has been reported more frequently in recent cases.

The highest risk remains among older adults, people with chronic conditions, and those with weakened immune systems. These groups are still more likely to experience complications.

Public health experts continue using wastewater monitoring to track spread, since it can reveal rising infections even before testing numbers increase.

Even if symptoms seem mild at first, doctors advise taking infections seriously. Rest, staying home, and avoiding contact with others can help prevent spreading the virus.

If symptoms worsen, last longer than expected, or become severe, seeking medical advice is important. Staying cautious remains the best approach as the virus continues to evolve.