Hello Karthik,

As you have mentioned the situation it is really a serious issue because many of them will suffer without any reason . It totally depends upon the candidate's family that what they want to do with him.

As per my view , the person shouldn't be allowed to sit in the examination because if he will sit there, there would be high risk of infecting the students with corona.

But as i said it totally depends on the family members of that person what they want to do. You should atleast inform the officials there at the center that he is suffering from covid so that they could arrange something.