The following information from a website would provide the best evidence for the thesis that popular books and movies are incorrect to portray infected animals and people as foaming at the mouth and behaving aggressively:
"Once the virus reaches the brain, it rapidly causes encephalitis, the symptoms of which include fever, headache, muscle weakness, and seizures. The virus also causes hypersalivation, or an increase in saliva production, which can cause the classic symptom of foaming at the mouth. However, this is not always present and is not the defining symptom of rabies. In fact, many people with rabies may not exhibit any symptoms until the disease has progressed to a more advanced stage."
This information highlights that while hypersalivation and foaming at the mouth can be symptoms of rabies, they are not always present and are not the defining symptoms of the disease. Popular books and movies often exaggerate these symptoms and portray infected individuals as being overtly aggressive and violent when, in fact, the early symptoms of rabies are often mild and non-specific. Therefore, this information serves as evidence to support the thesis that popular books and movies are incorrect in their portrayal of infected animals and people with rabies.