I" like your son's theory. It makes sense. My one question is, if the island has so many healing powers, how come Rousseau's team didn't survive the illness? "

cuz they or she first misdiagnosed the dis-ease

rather than letting it take its course

same as allowing the 2 thiefs to be buried alive ..
IF they had waited they would still be alive..

Dharma was up to no good..
MAYBE harvesting body parts cloning humans ..animals ect

MAYBE doing experiments to test bio weapons or even vaccines

to save the select few humans on the planet whom are chosen to live while MOST are getting the smokey date
and /or deep sixed

Dharma is JUST a test experiment to be redone on a global scale

look up the UN plan to control world population SCARY!