All substances take up the least amount of volume in their (1.) solid phase, a little more volume in their (2.) liquid phase, and the largest amount of volume in their (3.) gas phase. The closer atoms or molecules get to one another, the less volume is occupied by the substance that they comprise.
A large, retrospective series examining human bite wounds in children found that none of the bites manifesting as abrasions became infected, while the rate of infection was much higher in bite wounds that caused punctures or lacerations.
Any mammal, including humans, can contract any kind of rabies if they come into contact with it. Early symptoms of rabies include general weakness, discomfort, headache and fever, according to the Centers for Disease Control and Prevention. If there is a bite, there may be itching and agitation around the site.