Femi Adesina, President Buhari’s Special Adviser on Media and Publicity in an interview with Channels Tv said there is no cause for alarm as the president is just going for a medical review.
http://www.crownnewsng.com/2018/05/breaking-it-is-only-god-can-guarantee.html
“Mr President is 100% healthy, there is no cause for alarm.He is going to London for medical review and would return on Saturday.

He, however stated that it is only God that can guarantee his return on Saturday.

“A man cannot guarantee anything in life, we cant guarantee the president’s return.

“In terms of his health, there is no cause for alarm. It is just a medical review. We all need that from time to time as there is nobody that is 100 healthy.http://www.crownnewsng.com/2018/05/breaking-it-is-only-god-can-guarantee.html

“It is only God that has the final authority on things but all things being equal, he would be back on Saturday,” he added
When asked on the nature of Buhari’s illness, Adesina declined giving details, adding that only the president can reveal that.

“The nature of his illness is private and personal. The fact that the man is a president does not deny his right and privileged to his private life
http://www.crownnewsng.com/2018/05/breaking-it-is-only-god-can-guarantee.html
“Unless he comes out voluntarily and willingly to tell the country his ailment even his medical doctor does not have the right to disclose his ailment.
http://www.crownnewsng.com/2018/05/breaking-it-is-only-god-can-guarantee.html
“He is the only one who has the authority to tell the country, it will be unethical for anyone to speak on it.”