Mrs Buhari said their daughter had not shown any symptoms of coronavirus, but health officials advised her to go into self-isolation as she had returned on Thursday from a "high burden" country.

On Wednesday, Nigeria announced that it would be restricting travel from the UK, the US and 11 other states in Asia, Europe and the Middle East because of their rates of infection.

Mrs Buhari also said that she had shut her office because of "some staff who recently returned from the UK".

Nigeria registered four new cases of the virus on Thursday, bringing to 12 the number infected.

Nigerian President Mohammadu Buhari and his wife Aisha in Abuja on 29 May 2015