It has been argued that long-lived immunological memory depends on a source of persisting antigen [15], [16].
Whether this impetus will persist depends on the number of FPs being trained in the years to come.
If neuropsychiatric disorders are primarily the result of synaptic dysfunction, however, reversibility should not be so surprising: synaptic plasticity is, after all, presumably the basis for all of normal brain function that depends on memory, and it persists well into adulthood, which is why even as we age we can still learn and remember - at least some things.
What's more, unlike a vaccine, which builds long-lasting immunological memory against a pathogen, the designer antibody approach depends on the viral vector persisting and continuing to pump out the immunoadhesins.
Currently, there is no consensus as to whether or not long-term T cell memory depends on a source of persisting antigen.
Our findings strengthen the evidence that occupational exposure to endotoxins protects against lung cancer, and suggest that the effect depends on cumulative dose and persists after exposure ceases.
The extent of the public health risk depends on how long such elevated levels persist -- they may have declined after the fire at No. 4 reactor was extinguished -- as well as how far and fast the radioactive materials spread, and whether the limited evacuation plan announced by the government proves sufficient.
Whether oseltamivir-resistant viruses will persist beyond 2008 depends on several factors.
This is especially important for threats like invasive species, emerging infectious diseases, and climate change where there is little to no hope of eliminating the threat itself, and conservation depends on finding ways for species to persist in spite of the threat (Carroll 2011).
But how severe a season ultimately proves depends on how long high weekly death rates persist.
