Talking about the 'black fungus', Top virologist and member of SC-appointed committee on medical oxygen Dr Gagandeep Kang informed that it is not related to variant but overuse of steroids. “I don't think it (black fungus) is related to variant. It's related to fact that we've many cases, we seem to be using steroids freely and have lot of diabetics which is also risk factor for these cases,” said Dr Gagandeep Kang.