Bongo said he was "fiercely determined" to push ahead with a campaign against graft
The campaign aims to vaccinate around 825,000 children in 24 regions, over a period of nine days, the body said.
If traders close their store, they risk being punished by the authorities. But if they keep it open, they face the wrath of separatists
Biya also offered a "pardon" to any separatists who voluntarily lay down their arms
Bongo's state of health has been the subject of fierce speculation, as the Gabonese leader has only made a few appearances
The conflict has killed some 2,000 people and driven hundreds of thousands from their homes
The power-sharing agreement will see 23 members of the executive drawn from Tshisekedi's Direction For Change
The public outings were the first time Gabonese have seen their leader beyond the presidential palace since he fell ill last October