these are old arboviruses that have been well known since the 60's. If gates releases anything it's be something out of Africa or something most western countries don't have yet. [a list of what they could infect the west with](https://parasitesandvectors.biomedcentral.com/articles/10.1186/s13071-017-2559-9/tables/1) Most likely they'll use something to create chronicity requiring lifelong medical intervention or something fatal for population control.