Identify three characteristics of smallpox that aided in the global eradication of this disease through a rigorous vaccination program
What will be an ideal response?
(i) The smallpox virus evolves slowly, so the antigenic epitopes encountered in a vaccine are likely to be the same as or very similar to the actual virus if exposed to the virus later in life.
(ii) The vaccine is a live virus administered through the skin, so the immune responses that are induced will closely resemble those provoked by a natural infection and establish long-lived memory B cells and memory T cells.
(iii) Smallpox, unlike other poxviruses, infects only humans. This eliminates the possibility of alternative reservoirs in other animal populations and therefore requires the interruption of only one chain of transmission (namely human-to-human) to impede dissemination.
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acromegaly Sign that includes __________ of bone structure that causes disfigurement, especially in the hands and face
Fill in the missing word in the definition for the key term.
The brainstem and cerebellum receive most of their blood supply from which of the following arterial branches?
A. Internal carotid and posterior cerebral B. Vertebral and middle cerebral C. Vertebral and basilar D. Internal carotid and basilar
Social norms that individuals use as a reference when considering a new behavior are called anchor points.
Answer the following statement true (T) or false (F)
A common bursitis of the foot is retrocalcaneal bursitis, which occurs just above the attachment of the Achilles tendon to the calcaneus.
Answer the following statement true (T) or false (F)