Answer:
False
Explanation:
Antiviral drugs usually put some of the virus into you so that your body gets used to it, and knows when to fight it.
I am pretty sure that I know which word should fill this statement. Because they have similar chemical structures, morphine and other opiates are able to lock into receptor sites for endorphins. According to the definition and main functions of <span>endorphins, this option is the only suitable. Regards!</span>