Answer:
By bodily fluids, skin contact, airborne viruses, contaminated food/drinks or from insect bites.
Step-by-step explanation:
Communicable diseases are contagious and can be contracted by a person in many more ways (along with those that I've listed). An example of one would be Coronavirus, it can be transferred quickly from person to person if they're not cleaned or if they haven't taken any precautions.