Answer:
Infectious diseases are generally caused by microbes called pathogens that enter into the body and prevents it from functioning properly.
infectious diseases are caused by many different aspects and areas.for example,working as a dental nurse in a dental surgery,u can catch infectious disesases when dealing with patients and being in contact with blood, saliva. and handling instruments during procedures.that is why it is important that a mask and eyewear and gloves are worn.