Define attenuation and explain why attenuated organisms are useful for vaccines
What will be an ideal response
An organism that is old or otherwise weakened such that it cannot cause disease is said to be attenuated. It should
still possess many or most of its antigens that could initiate an immune reaction. Therefore, if the weakened
organism were injected into a host, the immune reaction should be specific against the appropriate antigens but the
host should not get sick.
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Fill in the blank with the right word.
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A) expulsion B) dilation C) effacement D) placental
A critical but often overlooked element of a healthy school environment is
A. building age and condition. B. adequate ventilation. C. social and psychological climate. D. classroom lighting and glare.
After exercise it is recommended to replace 100 to 120 percent of the water lost in order to fully hydrate
Indicate whether the statement is true or false