His condition is seriously ill, and he needs surgery immediately.

Ebola virus disease is highly infectious and can cause severe symptoms.

The infectious capacity of this virus is very strong.

The possibility of that plan succeeding is high.

His irresponsible behavior caused an accident.

The Ebola virus is a very infectious virus.

Even as he gets older, his virility does not diminish.

His symptoms are getting worse.

I was amazed at his extraordinary talent.

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