I, II and III are ALL communicable diseases known for targeting the human immune systems. Communicable diseases are transmissible diseases.
Communicable diseases are transmissible diseases, generated by the infection of pathogens in a suitable host.
The human immunodeficiency virus (HIV) represents a major communicable disease around the world. Polio is also a communicable disease that spreads via human-to-human physical contact.
Polio is a communicable disease that is transmitted from an infected individual to an uninfected individual via coughs or sneezes.
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