They - and four others - fell ill with diarrhoea, vomiting and bleeding after attending the burial of a nurse.
Newly developed vaccines will be acquired through the World Health Organization (WHO), officials said.
Between 2013 and 2016 more than 11,000 people died in the West Africa Ebola epidemic, which began in Guinea.
In response to that epidemic, which mainly affected Guinea and its neighbours Liberia and Sierra Leone, several vaccines were trialled, which have since been successfully used to fight outbreaks in the Democratic Republic of Congo.
