Question

This can make you sick and are transmitted by humans,pets and dirty needles

Answer 1

masterbutation can make u sick

Answer 2

According to the data mentioned in the question that,

This can make you sick and are transmitted by humans,pets and dirty needles;

The answer of this question is viruses.

Viruses can be transmitted by any dirty physical conductor and even by any living organism.And this viruses cause different types of diseases which are very harmful for our human body.