Laurie Garrett said this quote

In all, 86 per cent of the increased life expectancy was due to decreases in infectious diseases. And the bulk of the decline in infectious disease deaths occurred prior to the age of antibiotics. Less than 4 per cent of the total improvement in life expectancy since 1700s can be credited to twentieth-century advances in medical care.

~ Laurie Garrett

Ebola haunted Zaire because of corruption and political repression. The virus had no secret powers, nor was it unusually contagious. For centuries Ebola had lurked in the jungles of central Africa. Its emergence into human populations required the special assistance of humanity's greatest vices : greed, corruption, arrogance, tyranny, and callousness.

~ Laurie Garrett