Nigeria has 12 confirmed cases of the Ebola virus, up from 10 as at last week’s count, of which five have almost fully recovered, the Health Ministry said Monday. It said in a statement that 189 people in Lagos and six others in the southeastern city of Enugu were under surveillance. The death toll remains four, it said. A doctor who had recovered had been discharged from hospital, the ministry said. The Ebola virus has killed more than 1,000 people in Guinea, Sierra Leone and Liberia since the outbreak began in March, and four people have died in Nigeria since it was brought to Lagos by a Liberian man July 20. “Patients under treatment have now been moved to the new 40-bed capacity isolation ward provided by the Lagos state government,” the Health Ministry statement said. It added that experimental drugs were in the process of being cleared for the treatment of Ebola, although one, nano silver, had been rejected because it did not meet requirements.