Investigations into the body of anti-Covid-19 fighters in Nigeria have shown that the province of Lagos alone contains the virus, the highest level of publicity in all of Africa.
The total number of people in Nigeria is 153,000 who have been infected and 1,862 who have died.
The study was conducted on 10,000 people in the Nigerian provinces to see an example of the state of the coronavirus in the first most populous country in Africa.
Done before the start of the second one in December.
The findings of the ninth and tenth studies of the Nigerian Center for Disease Control (NCDC) and the Institute for Medical Research (IMR) fear, according to BBC correspondent Mayeni Jones, is Lagos.
The first infectious disease was reported to be low during the first half of the disaster, according to our correspondent.
The country reached the highest number of infections in the first month when it announced 1,600 new cases of the virus, indicating that there were more people infected in the second.
What does this lesson show?
The results show that one in five people tested in Lagos, Enugu and Nasarawa provinces were found to have the virus.
In the northeastern Gombe province, the figure was one in 10.
The rate of infection was higher in men, and people living in cities also had the highest risk of infection, according to the study.
According to the NCDC driver, the vast majority of the 186 million people living in Nigeria are still at risk of contracting the virus.
Dr Chikwe Ihekweazu, NCDC chief executive, said: "Between 80 and 90 per cent of people in the four provinces are likely to be infected, which means that the vaccination campaign we are about to start in Nigeria is becoming more and more necessary."
The country recently approved the use of the Oxford-AstraZeneca vaccine, but it is not known when it will start to arrive in the country.
Why are statistics of the situation so important?
Experts say that having a picture of the dead, who killed him and where he died, is important when it comes to cross-cutting.
The number of people infected with the virus and the number of people killed by coronavirus in Africa may be much higher than the official rate due to the small number of cases and the death toll is not recorded at all.
Nigeria is one of the few countries in Africa that has no mandate to register the dead, according to a BBC investigation.
Egypt, South Africa, Tunisia, Algeria, Cape Verde, S?o Tomé and Príncipe, the Seychelles and Mauritius are the only ones that have a governing and coordinated body for the entire country to register the dead.