If an infectious disease starts spreading to large numbers of people, it is known as an 'epidemic'. If the numbers of people become great, or involving a whole population seriously, then it may be referred to as a 'pandemic'.
同時に多くの人がかかる感染症は"epidemic"（伝染病）として知られています。更に多くの人々が感染し、人口全体を脅かす深刻な事態に発展した場合は"pandemic"（世界規模の伝染病）と言います。
There was an ebola epidemic in West Africa.
西アフリカではエボラが大流行した。
pandemic（パンデミック）という言葉を使うこともできます。
There was a terrible Ebola epidemic in West Africa
When we describe something as 'terrible' it implies that that thing was very bad.
An 'epidemic' is when a disease or illness spreads quickly among a population. In West Africa the disease spread quickly, and far and wide. People in the USA and Europe were being diagnosed with the illness.
The disease was mainly active in Guinea, Liberia and Sierra Leone.
There was a large outbreak of Ebola in west Africa in 2014.
There was a large outbreak of Ebola in west Africa in 2014.
→2014年に西アフリカでエボラが大流行した。
「outbreak」には「〔伝染病の〕急激な発生」という意味があります。
「西アフリカ」は「west Africa」、「Ebola」は「エボラ」です。
回答は一例ですので、参考程度でお願いします。
ありがとうございました
Recently, there was a large scale epidemic of Ebola in West Africa.
The word "recently" talks about the latest outbreak of Ebola. The phrase "large scale" emphasizes just how big the outbreak was.
I hope that this helps :)
"There was an outbreak of Ebola in West Africa."
Saying there was an outbreak means a large scale sickness. You are saying that it was in West Africa so it gives a place.
例：
There was an outbreak of Ebola in West Africa.
西アフリカでエボラ出血熱が、大流行した。
there was an outbreakと言うと、大規模な病気を表します。in West Africa（西アフリカで）と言って、場所を示しています。
In West Africa, there was a large outbreak of Ebola
There was a large outbreak of Ebola in West Africa
When you want to explain that there was an Ebola outbreak in West Africa, then you can say:
-In West Africa, there was a large outbreak of Ebola
-There was a large outbreak of Ebola in West Africa
西アフリカでエボラが流行したことを説明したいなら、次のように言うことが出来ます。
【例文】
-In West Africa, there was a large outbreak of Ebola
（西アフリカでエボラが大流行しました）
-There was a large outbreak of Ebola in West Africa
（西アフリカでエボラの大流行がありました）
There was a large outbreak of Ebola in West Africa
There was an epidemic of Ebola in West Africa
When an infectious disease spreads widely across a country or region then it is referred to as an 'epidemic' you can also use the word 'outbreak' this means the same thing
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