g) Immunoenhancers
Thymosin α‐1 could control the spread of SARS disease. Methylprednisolone, a Corticosteroid agent, was often used during the acute respiratory distress syndrome(ARDS) and it Destroyed thymocytes. So, it is better to use thymosin α1 at the early illness, before ARDS happens(52).
Levamisole: This drug has different effects on the immune system based on the dosing and the time of administration; immunostimulant agent or immunosuppressive agent. A combination of levamisole and ascorbic acid was reported to be a lymphocyte enhancer (53).