🧬 New Nextstrain Clade Designation Alert

⚠️ Action Required: A new clade has been assigned by Nextstrain, consider adding it to the wastewater monitoring.

📌 Please keep this issue open until the new variant is added. This triggers automatic variant definition generation as PR from CovSpectrum when the data becomes available. You can also add manually and close.

Date Detected: July 22, 2025
Source: nextstrain/ncov

New Clade(s) Detected

• 25C (XFG) (emerged: January 01, 2025)

Summary

• New Clades: 1
• Total Clades: 52
• Previous Total: 51

About Nextstrain Clades

Nextstrain clades are designated when a variant:

• Reaches a frequency of 20% globally at any time point
• Is at least 2 mutations away from its parent major clade
• Shows significant geographic spread

Clade names consist of the year they emerged and the next available letter in the alphabet (e.g., 19A, 20A, 21A, etc.).

Resources

CovSpectrum Links for New Clades

• 25C (XFG): Explore variant data

General Resources

• 🔬 Nextstrain SARS-CoV-2 Build
• 📖 Clade Naming Documentation
• 📂 Source File
• 🔍 Detailed Clade Definitions
• 📄 Display Names
• 📅 Emergence Dates

This issue was automatically created by the Nextstrain Clade Monitor action.