검증된 단계별 안내
04:57
04:52
03:52Which of the following statements is false?
a. B19 virus is the primary parvovirus of humans.
b. Erythema infectiosum is caused by a parvovirus.
c. In children, parvovirus infections are accompanied by a high mortality rate.
d. Parvovirus infection in humans results in infectious reddening of the skin.
Which of the following statements is true concerning variola major?
a. It carries a mortality rate of less than 1%.
b. It affects internal organs before appearing on the skin.
c. The causative virus has been totally eradicated from Earth.
d. The skin lesions it causes are smooth, waxy, tumorlike nodules on the face.
A man experienced a laboratory accident in which he was infected with adenovirus. What signs or symptoms might he exhibit?
a. Sore throat
b. Headache
c. Pinkeye
d. All of the above
What observation led scientists to understand the relationship between shingles and chickenpox?
Which of the following is an inflammatory condition of the liver?
a. Fifth disease
b. PML
c. Seed warts
d. Hepatitis
Most of the world’s population in less developed and developing countries have been infected with EBV human herpesvirus 4 by age one and show no ill effects, even where medical care is poor. In contrast, individuals in industrialized countries are ordinarily infected after puberty, and these older patients tend to have more severe reactions to infection despite better overall health and access to medical care. Explain this apparent paradox.
