New Covid variants, XFB (Stratus) and NB.1.8.1 (Nimbus), are causing a surge in US infections, particularly in the Northeast, with severe sore throats a common symptom. While these strains are not more dangerous, they spread more easily. Wastewater data indicates rising cases in some regions, though national levels are moderate. Experts emphasize preparedness due to risks for vulnerable populations and warn against complacency regarding long Covid. Vaccination remains recommended, despite recent controversy over vaccine eligibility and efficacy.

Prepared by Olivia Bennett and reviewed by editorial team.