Ms Cafferkey was originally infected while working in Sierra Leone in December 2014 and spent almost a month in an isolation unit at the Royal Free Hospital in London.
She was released after making a recovery but fell ill again in October last year and was again treated at the Royal Free for meningitis caused by Ebola.
At one point the Scottish nurse was described as “critically ill” but was discharged in November and transferred to Glasgow”s Queen Elizabeth University Hospital to continue her recovery and later returned home.
She is now being treated again at the Glasgow hospital.
An NHS Greater Glasgow and Clyde spokesman said: “Under routine monitoring by the Infectious Diseases Unit, Pauline Cafferkey has been admitted to hospital for further investigations.”
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