Infectious diseases are disorders caused by pathogenic organisms – such as viruses, bacteria, or fungus. They are normally harmless but under certain conditions, some organisms can be fatal and can cause death too. Acinetobacter, Anthrax, Aspergillus, Bird flu or Avian Influenza, Bubonic plague, Clostridium difficile or C. difficile, Cyanobacteria or Cyanophyta, Chagas or Kissing Bug, Chikungunya, Cholera, Cystitis, Dengue fever, E. coli or Escherichia coli, Ebola – formerly known as Ebola haemorrhagic fever and so on. There are many more types of infectious diseases which include enteroviruses, along with rhinoviruses and human parechoviruses, which are a genus of positive-sense single-stranded RNA viruses associated with several human and mammalian diseases. The non-polio viruses are responsible for various diseases in children; although infection and illness occur most commonly in infants.