Presidential spokesman, Garba Shehu, last week tested positive for COVID-19.
There were also reports that other presidential aides had tested positive and are currently in isolation.
Speaking on Channels Television on Sunday, Adesina said presidential aides are also humans.
“What I like to say is that presidential aides are just humans. They can fall sick. If anything happens to human beings, it can also happen to presidential aides,” he said.
“The fact that we are presidential aides does not make us immune to certain things. If there is a virus that is ravaging the society, well, it can touch anybody.
“So Mallam Garba Shehu has confirmed that, yes, he tested positive but he said it’s mild. I believe that by now, because it happened since Wednesday, he should have almost beaten it if he has not beat it already. There is no cause for alarm.”
Asked how many presidential aides have contracted COVID-19, Adesina said it is not within his “purview” to reveal the details.
“That will not be within my purview to discuss, maybe if you get the presidential doctor or anybody on the medical side, they will tell you, I wouldn’t know because it is a private thing,” he added.
When asked if Buhari is currently in isolation as he may have come in contact with Shehu, he insisted the president is “quite fine” and is going on with his normal routine.