Complex sentence: In response to the epidemic, the FEMA (in collaboration with VersaLife) produced a vaccine (Ambrosia) which was not released to the public but rather only to a select few, such as politicians and leaders of other major economic or military organisations.
Split into simpler sentences: In response to the epidemic, FEMA (in collaboration with VersaLife) produces a vaccine, Ambrosia. Ambrosia is not released to the public; rather, it is only given to a select few, such as politicians and leaders of major economic and military organisations.