Johannesburg investment banker Cheri Nel has dropped her court case against Vertex Pharmaceuticals. She had asked the Gauteng High Court to allow generic versions of Trikafta, a cystic fibrosis medicine, to be imported to South Africa. Trikafta, a “miracle” treatment, significantly improves the lives of cystic fibrosis patients. Since its 2019 US registration, it has been effective for 90% of…