Ebola can enter the human body through sores on the skin or mucous membranes.
However, currently the country most affected by the latest outbreak is Guinea.
It is the first outbreak of the deadly virus there since a 2013-2016 outbreak, which was considered the worst in the world.
The 2013-2016 outbreak spread to several West African countries.
The deadly pathogen killed thousands of people during its latest outbreak and WHO is concerned about the latest resurgence, especially in the midst of coronavirus crises.
WHO Regional Director for Emergencies Abdou Salam Gueye said: “There are six neighboring countries in Guinea and we have carried out a readiness assessment.
“Two of the countries are not ready and one is on the border and there are three countries more or less ready.”
Countries bordering Guinea are not prepared to implement mass vaccination programs against Ebola.
Gueye added: “These neighboring countries have agreed to cross-border cooperation and coordination to control the outbreak.”
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The country currently has the capacity to inoculate 100 people a day.
This will be the first time that an Ebola vaccine will be distributed in the country.
Currently, 1,604 people have been vaccinated in Guinea.
Bachir Kanté, a health ministry official, said: “In the next few days, we will be able to vaccinate more people to contain this pandemic properly.”