Echinaforce Study to Investigate Explorative Pharmacology and Effectiveness to Prevent From Enveloped Virus Infections

"Preventive treatment: 3X2 EC tablets daily during 2 + 2 months of prevention after run-in of 1 week and intermittent treatment break of 1 week without treatment + 1 month of voluntary follow-up prevention.~Acute treatment: 5 X 2 EC tablets daily for max. 10 days per individual vRTI or until symptom resolution."