Flu Disease Symptoms and Prevention against Virus and Infection. Character has Respiratory Illness and using Medical Mask, Tissue for Sneezing, making Vaccination. Flat Cartoon Vector Illustration. Shutterstock .eps vector - Flu Disease Symptoms and Prevention against Virus and Infection. Character has Respiratory Illness and using Medical Mask, Tissue for Sneezing, making Vaccination. Flat Cartoon Vector Illustration. - ID: 1642876252