6. A nationwide contagion is an epidemic. An international contagion is referred to as a...

7. Which of the following is an accurate description of vaccines can develop immunity?

Dead or inactive forms of the relevant pathogen pass into the body's blood vessels; the body's pores and epithelial tissues then develop preventative mucuses and acidic compounds that will trap and kill these pathogens in the future
The vaccine contains no pathogens, but does contain enzymes that catalyse and improve leukocytic protein synthesis; this means that white blood cells become stronger, and can produce more effective antibodies and antitoxins
Dead or inactive forms of the relevant pathogen are injected into the patient. The patient's white blood cells then respond by learning and emitting the appropriate antibodies and antitoxins, remembering these for the future
The vaccine contains raw antibodies, antitoxins, and, in certain cases, additional white blood cells, that are then stored by the body, for immediate release if the corresponding pathogens enter the body. Leukocytes must match antigenic composition

The effectiveness of specialised scientific equipment in dealing with microorganisms can be observed
Medical researchers can earn money! ;)
Their reactions to various new antibiotics can be observed, to see the effectiveness of a developing drug
Their reproductive rate under different conditions can be observed, and thus accurate prognoses and medical predictions made

False: Pathogens are microorganisms that cause disease, they are not the disease themselves
True: Pathogens are the microscopic embodiment of any given disease

Pathogens had not been discovered, so he could not prove why this would make a difference
He was only a young doctor, who had made no former discoveries
His suggestion appeared to counteract previous findings by other scientists
The fatality rate in hospitals was relatively low anyway, and they didn't think it mattered

Pathogens become trapped by mucus, and are killed by the stomach's hydrochloric acid
Epidermal pores secrete a toxin deadly to most pathogens, but undetectable to us without scientific equipment
The body's microvilli ingest and destroy pathogens
Salivary enzymes, such as amylase, break down the microorganisms until they're ineffective

True: Vaccines cause immunity, but also, sometimes, other ailments; it is worth contracting a short-term mild illness for entire prevention of a more serious one, however, most people argue
False: Vaccines are entirely safe; immunity is not worth the risk of contraction of another disease, most people argue