There is insufficient publicly available evidence at the current time to accurately verify this claim.
As of now, there is no official evidence regarding it by neither the NCDC nor the Nigerian government. Hence, the veracity of the claim cannot be proved.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.