Kyari has a history of medical complications, including diabetes, and is the gatekeeper to the president. Many who wish to deal with Buhari must go through Kyari, including Nigeria’s top politicians and businessmen.

He traveled to Germany in early March with a delegation of other Nigerian officials for meetings with Siemens AG. It is unclear if he self-isolated upon his return to Nigeria.

A presidency spokesman did not comment on whether Buhari has been tested. The president himself has undisclosed medical ailments, and spent five months in London for treatments in 2017.

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