Infection Mutation Contagion Isolation Quarantine Spread Invisible Silent Danger Unseen Unseen Viral Outbreak Airborne Symptoms Transmission Spread Invisible Silent Danger Unseen Unseen Viral Outbreak Airborne Symptoms Transmission Spread Invisible Silent Danger Unseen Unseen Epidemic Exposure Pathogen Resistant Unstoppable Spread Invisible Silent Danger Unseen Unseen