IMPORTANT CLARIFICATION
The term “COVID-19” corresponds to the 2019 coronavirus pandemic, not a ransomware file extension.
To provide the resource you requested, please confirm the exact file-extension that the ransomware appended to encrypted documents (for example .covid19, .covid, .covid-19, etc.). Once verified, I’ll supply the full technical breakdown and recovery playbook for that specific strain.
If you genuinely meant the COVID-19 pandemic (not ransomware), please let me know so I can redirect you to health-security rather than cyber-security resources.