Covid treatment expenses alliwability

A Sr Managing partner o
f a firm having HO at Bangalore and branch at Baroda. He went on business trip to the branch and there he fell ill due to severe Covid symptoms. He was admitted to hospital and took treatment due to oxygen and breathing problems. A very hospital expenses were incurred .He is still under treatment.
He was shifted Bangalore by air ambulance incurring a very expenses. He is still under treatment. My question is whether all the expenses incurred as above can be treated as business expenses as he was on business trip in the firm account? Expenses not covered under medicine claim insurance
kindly any can give their opinion in the matter with reference to to availability as business expense