WHAT THE CONSTITUTIONAL SAYS ABOUT A PRESIDENT WITH BAD HEALTH

WHAT THE CONSTITUTIONAL SAYS ABOUT A PRESIDENT WITH BAD HEALTH
S.144(1) The President or Vice-President shall cease to hold office, if

(a) by a resolution passed by two-thirds majority of all the members of the executive council of the Federation it is declared that the President or Vice-President is incapable of discharging the functions of his office; and

(b) the declaration is verified, after such medical examination as may be necessary, by a medical panel established under subsection (4) of this section in its report to the President of the Senate and the Speaker of the House of Representatives.
(2) Where the medical panel certifies in the report that in its opinion the President or Vice-President is suffering from such infirmity of body or mind as renders him permanently incapable of discharging the functions of his office, a notice thereof signed by the President of the Senate and the Speaker of the House of Representatives shall be published in the Official Gazette of the Government of the Federation.
(3) The President or Vice-President shall cease to hold office as from the date of publication of the notice of the medical report pursuant to subsection (2) of this section.
(4) the medical panel to which this section relates shall be appointed by the President of the Senate, and shall comprise five medical practitioners in Nigeria:-
(a) one of whom shall be the personal physician of the holder of the office concerned; and
(b) four other medical practitioners who have, in the opinion of the President of the Senate, attained a high degree of eminence in the field of medicine relative to the nature of the examination to be conducted in accordance with the foregoing provisions.
(5) In this section, the reference to executive council of the Federation is a reference to the body of Ministers of the Government of the Federation, howsoever called, established by the President and charged with such responsibilities for the functions of government as the President may direct."

This section does not  expect the occupants of the offices in resign issue to resign upon being called upon by any person or group of persons to so resign. So, those now calling on PMB to resign on the ground of his present health challenges must understand the express provision of the constitution on the matter.