Summer COVID Surge? As Cases Rise, See 2026 Quarantine Guidelines, Symptoms to Watch

Key Points:

• COVID-19 infections are rising again across all 50 U.S. states as of mid-August 2026, with the South and West experiencing the fastest increases, although overall national activity remains low.
• Wastewater data indicates a significant upward trend in SARS-CoV-2 levels since late June, particularly in California and Texas, signaling the start of a late summer COVID wave expected to peak around early September.
• The current surge is driven mainly by the XFG.1.1 variant, a recombinant omicron strain, with no major new variants emerging; symptoms remain consistent with previous omicron infections.
• COVID-19 vaccines updated for the 2026-2027 season to target circulating variants are anticipated to be available by September, and experts recommend vaccination, especially for high-risk populations, to reduce severe illness and long COVID risk.
• CDC guidelines advise isolation for infected individuals until symptom improvement and fever-free status for 24 hours, with continued precautions such as mask-wearing and social distancing to limit spread during the ongoing surge.