The most recent accounts I've seen were in Cold Case Hammarskjöld (documentary).

They found a few defectors/whistleblowers that had visited and worked at SAIMR's (South African Institute for Maritime Research) CIA funded labs used to synthesize these bogus vaccines, mainly HIV.

https://www.youtube.com/watch?v=DLclWdK0cy4

HN Commenters: "Africans have nothing to worry about with vaccines..."

White SAIMR ex-agent: beware of the "'white philanthropists' coming in and opening free X to help treat Y..."

Seems a mixture of ignorance, white, and first world privilege are at work here at the same time.