The disease is contagious by close contact or air. The appearance is red rash all over the body and fever. The only way to prevent these diseases is timely vaccination. After a stable immune disease develops a vaccine that helps build immunity. which induces immunity against the pathogens of these infections Viral Infection โรคประสาทSARS Influenza Viral Infection ARVI Influenza is dangerous because the infection spreads rapidly in large groups.