There are many viral infections, such as measles, rubella, mumps, chickenpox, novel coronavirus pneumonia, AIDS, condyloma acuminata, and viral hepatitis, including viral hepatitis B, viral hepatitis A, viral hepatitis C, and viral hepatitis E. Chickenpox is a respiratory infection caused by varicella-zoster virus; measles is a respiratory infection caused by measles virus; mumps is a respiratory infection caused by mumps virus; rubella is a respiratory infection caused by rubella virus; AIDS is a serious infection caused by HIV virus by blood route and sexual life; hepatitis B is caused by hepatitis B virus; warts are caused by HPV virus.