Samples of blood and saliva of four persons, who have been suffering from fever and cough, and undergoing treatment at the Isolation Unit of Mohammad Ali Hospital in Bogura, were sent to Rajshahi Medical College Hospital (RMCH) for coronavirus tests.
However, the hospitals doctors claimed that the four are not infected with coronavirus.
The hospital's resident medical officer (RMO) Dr Shafique Amin Kajol said there are five patients --a woman, a child and three men -- were admitted to the hospital with coronavirus symptoms.
However, the physical condition of four of them has improved.
It is possible to know after the tests whether they are coronavirus patients or no, he added.