treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness main role treat acute illness treat acute illness main role treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness treat acute illness Internist, or Doctor of Internal Medicine treat acute illness treat acute illness treat acute illness