I can't remember the fourth country, but there was Burundi and Tanzania. Within a few months of the vex rollout, they had both ended up in the hospital for some sort of condition and came out dead. The leader of Haiti lasted until the summer of 2021, when he was murdered by a team of 20 gunmen who showed up at his house and shot him to death. The media claims that the motive behind this attack, as well as who was ultimately behind it, is still "unknown".