Overview

• WHO-tracked recombinant Omicron subvariant XFC/XFG has grown rapidly worldwide and is reported as accounting for more than half of recent global cases, with the agency maintaining a low public-health-risk assessment.
• Argentina’s BEN confirmed XFG locally and found it in 3.37% of 89 samples from March–July, rising to over half of sequenced cases in the most recent subperiod reviewed.
• After three initial confirmations in Córdoba, the Health Ministry has not issued updated genomic surveillance, so clinicians are leaning on clinical presentation to spot probable infections.
• Specialists describe a consistent profile that includes dysphonia or aphonia with intense sore throat often likened to a knife, brief loss of smell, and gastrointestinal symptoms without severe disease in most cases.
• With Nomivac data showing over 99% of people received no COVID dose in 2025, CoNaIn and the government moved to align COVID and flu vaccination guidance for simultaneous administration to defined risk groups.