Liberia population = About 4 million
Total Ebola cases in Liberia since last December = About 4,000
This is a country with arguably the worst health care system in the world, virtually no public sanitation, terrible education, lots of shamanistic beliefs... All set in a tropical climate. Basically, it's the perfect breeding ground for an epidemic disease, and the infection rate is about 0.1%
Conclusion = We'll be fine.