PETALING JAYA: Patients who have recovered from Covid-19 will have to go through follow-up treatment every three months as there is no evidence to suggest that the presence of antibodies could serve as an "immunity passport", says Health director-general Datuk Dr Noor Hisham Abdullah.
He said currently, the ministry is conducting short-term and long-term studies on those who have been allowed to return home based on various categories.
