This was a comment Im turining into a theory.
The 'sickness' is the trauma from becoming unstuck in time. The injections stabilize the mind when this trauma occurs.
But how do people become unstuck in time?
Intense exposure to the island's energy or energy like it, such as in Faraday's experiments.
The island's energy can make the mind un-stick in time. Desmond experienced this for the first when he turned the Fail-Safe key in the hatch as the magnetic energy was building and building. Desmond was at the center of the release; he was exposed to a massive amount of energy; his mind to leaped to the past.
Other characters who we've seen become unstuck have suffered severe trauma and even death. I can think of three characters other than Desmond. First we saw one of the Freighters die as his mind came and went from other time periods. Second, we saw the girl who Faraday experimented on at Oxford; she is sort of comatose, but kept alive thanks to financing and maybe even injections from the Widmore agenda. Third, we see Faraday's multi-lingual Red-head lover-girl suffering severe trauma as her little girl mind comes and goes, then speaks with special knowledge of the well's location, then as an oracle claiming, 'This Place Is Death!' Her mind comes and goes--unstuck in time.
In the episode, THIS PLACE IS DEATH, Faraday conjectures, past exposure to the island might be triggering the 'sickness' the time leapers are experiencing. We find out that the Red-head was there are a child. This leads me to the next conclusion about sensitivity to the island and the injections...
The Others did inject the two pregnant women. Given the above, it makes sense to inject them if the Others know that the reason babies do not survive to full term is because they become unstuck in time and cannot withstand the trauma, just like everyone else who gets too much exposure except Desmond, who was on injections when he turned the Fail-safe key and found his Constant when he left on the chopper.
Last thing I'd like to see someone comment about is that piece of info from Jack's blonde misstress, the Other Doctor Baby Specialist remember when she reviewed that case about a woman whose womb was that of a 70 year old...? When a baby becomes unstuck in time, does it sort of experience it's whole life, causing the womb to age too? Does this trauma to the baby's mind affect the habitat inside the mother? Is that why the pregnant women usually die on the island too? Theory by CristoRob
The 'sickness' is the trauma from becoming unstuck in time. The injections stabilize the mind when this trauma occurs.
But how do people become unstuck in time?
Intense exposure to the island's energy or energy like it, such as in Faraday's experiments.
The island's energy can make the mind un-stick in time. Desmond experienced this for the first when he turned the Fail-Safe key in the hatch as the magnetic energy was building and building. Desmond was at the center of the release; he was exposed to a massive amount of energy; his mind to leaped to the past.
Other characters who we've seen become unstuck have suffered severe trauma and even death. I can think of three characters other than Desmond. First we saw one of the Freighters die as his mind came and went from other time periods. Second, we saw the girl who Faraday experimented on at Oxford; she is sort of comatose, but kept alive thanks to financing and maybe even injections from the Widmore agenda. Third, we see Faraday's multi-lingual Red-head lover-girl suffering severe trauma as her little girl mind comes and goes, then speaks with special knowledge of the well's location, then as an oracle claiming, 'This Place Is Death!' Her mind comes and goes--unstuck in time.
In the episode, THIS PLACE IS DEATH, Faraday conjectures, past exposure to the island might be triggering the 'sickness' the time leapers are experiencing. We find out that the Red-head was there are a child. This leads me to the next conclusion about sensitivity to the island and the injections...
The Others did inject the two pregnant women. Given the above, it makes sense to inject them if the Others know that the reason babies do not survive to full term is because they become unstuck in time and cannot withstand the trauma, just like everyone else who gets too much exposure except Desmond, who was on injections when he turned the Fail-safe key and found his Constant when he left on the chopper.
Last thing I'd like to see someone comment about is that piece of info from Jack's blonde misstress, the Other Doctor Baby Specialist remember when she reviewed that case about a woman whose womb was that of a 70 year old...? When a baby becomes unstuck in time, does it sort of experience it's whole life, causing the womb to age too? Does this trauma to the baby's mind affect the habitat inside the mother? Is that why the pregnant women usually die on the island too? Theory by CristoRob