The drug is extremely expensive and would be difficult to make widely available. The drug has to be administered several times a day, so patient compliance is likely to be low. When misused by taking larger-than-prescribed doses, the drug can be fatal. Use of the drug contributes to the development of deadlier forms of chicken pox that are resistant to the drug.
An antidote for chicken pox has been developed, but researchers warn that its widespread use could be dangerous, despite the fact that this drug has no serious side effects and is currently very effective at limiting the duration and severity of chicken pox.
Which one of the following, if true, helps most to reconcile the apparent discrepancy indicated above?