Ihekweazu said the disease may not be as tough on some as it would be on others.
The NCDC boss said this while speaking during a Channels TV programme on Thursday, saying those patients are at the isolation in order to prevent them from spreading the virus.
He said: “I think people really need to understand why people are being put in these centres. Normally, you only go into a hospital when you’re ill, get a diagnosis, and then you are sometimes admitted if you’re very ill.
“But in this case, following the experience from other countries, we made a decision as a country to also put people in isolation centres not just because they are ill on their own but in order to stop them from transmitting this virus to others.”