Borissova, endokrinolog i profesor na Medicinskom univerzitetu u Sofiji, došla je na mjesto Bozhidara Naneva, koji je krajem marta dao ostavku nakon što je optužen za korumpiranost u vezi jednog ugovora za nabavku antivirusne vakcine Tamiflu krajem prošle godine.
Borissova, an endocrinologist and a professor at the Medical University in Sofia, replaced Bozhidar Nanev, who resigned at the end of March after being charged with corruption over a contract for the purchase of the antiviral medicine Tamiflu late last year.