Answer:
Biological contamination is the leading cause of food-borne illness and food poisoning*, and a common cause of food spoilage and food waste. There are six types of microorganisms that can cause food-borne illness: bacteria, viruses, parasites, protozoa, fungi and prions.
Answer:
your spit is one of them too
Explanation:
they're not really but considering your fresh pee is 10x less dirty than a spit I'm considering.
Answer:
Human papillomavirus (HPV)
Explanation:
The rough growths described are warts, which are skin growths caused by HPV.
HPV stimulates the growth of the cells on the outer layer of the skin, forming warts. There are many types of HPV, some cause warts on the hands, others can affect the feet, face, genitals, and more.
HPV infections are very common and can be spread by skin-skin contact
