My brother was covid positive 45 days ago. He had itching and nose blockage and he consulted ENT Specialist and did endoscopy and told there is no case of Black Fungus and also he suggested to get CT PNS done which also came normal. I just want to ask do we need to repeat any further tests just to rule out Black Fungus case? Once CT PNS and Endoscopy is normal do we need to repeate..? Can Black fungus cause after 45 days of covid infection.