The new strain of coronavirus seems to be very dangerous. This infection is even unable to be detected in the RT-PCR test and antigen test. According to Dr Anant Mohan from Delhi AIIMS, the severity of the infection can be identified by the two major symptoms including breathing process and oxygen saturation. So, a CT scan is required when you are low on these two. Meanwhile, other health experts also gave detailed information about the same, Watch the video.