When can we reinstate a healthcare professional who has tested positive and can we expose him to covid after being infected by covid? Is it preferable not to be exposed to covid patients if the disease has passed? / 感染病毒的医护人员多久以后可以重回岗位?在 感染之后能让他再次暴露在有病毒的环境中么? 染病后是否最好不要让他再接触患病者?