This is not necessarily the exact amount
of water you yourself will need — the IOM points out, «Given the extreme variability in water needs that are not solely
based on differences in metabolism, but also in environmental conditions and activity, there is not a single level
of water intake that would ensure adequate hydration and optimal health for half
of all apparently healthy
persons in all environmental conditions... the AI [Adequate Intake] does not represent a requirement; it is an amount that should meet the needs
of almost everyone in the
specific life stage
group under the conditions described.»
On the
basis of the current studies as well as previous reports on the use
of intradermal immunization against influenza, hepatitis B, rabies, and other infectious diseases, 2,3,8 it is becoming clear that use
of the intradermal route may at least partially overcome the relatively poor influenza -
specific immune responses seen in certain at - risk populations, particularly the elderly, in whom the immune response in general is known to diminish with age.9 Moreover, in times
of shortage, the dose - sparing intradermal approach might be particularly well suited to the young, healthy
persons included in the CDC's high - priority
group for vaccination, such as health care workers, as well as to younger, otherwise healthy populations in general.