On 8 April 2020 Gen Solly Shoke signed off on the importation of Heberon, a Cuban alpha-2b interferon, as a COVID-19 treatment for SANDF members. The consignment — 970,695 vials, later valued at R217 million to R228 million — arrived at Waterkloof air base without registration by the South African Health Products Regulatory Authority, without a tender and without National Treasury approval, and was procured through the logistics division rather than the military health service, whose Maj-Gen Lesley Ford objected. About fifteen doses were ever administered. The drug was returned to Cuba by 19 January 2022; R34 million had been paid.

The SIU's investigation, reported to Scopa on 28 January 2025, found no proper procurement and that the order should be cancelled; the contract was set aside, 25 officials were referred for discipline and R33.4 million recovered. The Auditor-General recorded R33 million in fruitless expenditure. The DA laid criminal charges in 2022; no prosecution has followed. The SANDF's defence was that the drug was acquired for the "protection of members" under the bilateral agreement. The record is a child of Project Thusano.