Type A influenza (including H1N1) and infectious diseases (such as, scarlet fever; pneumococcal disease or pneumococcal meningitis, streptococcus, etc.), by definition are highly contagious and spreads from person-to-person in several ways: when an ill person sneezes or coughs, infected droplets enter another person through the nose, mouth or eyes; or the droplets can land on a contact surface (e.g., a doorknob) that is touched by another person who then touches their face. Ask any teacher and they’ll tell you, when one child comes to school sick, illness can spread quickly through the classroom.