Are sinus infections contagious ? -various aspects- Sinusitis itself is not transmissible. Nevertheless, the root causes of sinusitis may be transmissible. Viral infections, like the common cold, are a frequent cause of acute sinusitis. In this situation, the virus may spread via respiratory droplets when a person who is infected coughs, sneezes, or speaks. Sinusitis … Continue reading Are Sinus infections contagious ?