Two doctors at Jalpaiguri Sadar Hospital in West Bengal who have shown symptoms of swine flu continued to treat patients at the State run facility.
After the doctors complained of fever and respiratory distress, the hospital authorities on Tuesday sent the two doctors on leave.
However, the doctors were seen at the hospital on Wednesday.
The same evening, National Institute of Cholera and Enteric Diseases (NICED) where the samples were sent, gave its report declaring that the doctors were infected with H1N1 virus.
Asked about the development, Chief Medical Officer of Health (CMOH) of Jalpaiguri, Prakash Mridha, admitted that at least one of two affected doctors was on duty on Wednesday.