Bangladesh, Sept. 20 -- Noted microbiologist Bijon Kumar Sil, who led the researchers of Gonoshasthaya Kendra (GK) in inventing coronavirus rapid testing kits, returned to Singapore on Sunday due to work permit complications.

Dr Bijon left Hazrat Shahjalal Airport around 7.30 am by a flight of Biman Bangladesh Airlines, said GK's press adviser Jahangir Alam Mintoo.

"Gonoshasthya Kendra will provide him all-out cooperation so that he gets a visa to come back to Bangladesh. Hopefully, he'll return to the country soon as he's always eager to work here," Mintoo said.

Born in Natore of Bangladesh, Dr Bijon is currently a citizen of Singapore. He has been working as the head of microbiology department of Gono University for nearly one and a ...