Gabon

S1, E1: Mathieu heads to Gabon where, in the heart of the forest, he discovers a vegetative lushness. He follows a veterinarian working to save endangered species, particularly gorillas. Mathieu meets Florian who tracks viruses that great apes can transmit to humans. In Franceville, scientists examine mandrills, healthy carriers of the SIV virus, the HIV of primates.