QuantBioRes is working on a treatment not a vaccine, but CEO says tennis star is ‘not anti-vax’ Novak Djokovic is the controlling shareholder in a Danish biotech firm aiming to develop a treatment for Covid-19 that does not involve vaccination, it has emerged. The world No 1, who was deported from Australia this week after the government cancelled his visa in a dispute over a medical exemption relating to his unvaccinated status, bought an 80% stake in QuantBioRes in 2020. Ivan Loncarevic, the company’s chief executive, confirmed the investment to Reuters. He subsequently told the Financial Times that he had...