Over the past 50,000–100,000 years, as modern humans increased in numbers and dispersed throughout the world, new infectious diseases emerged, including those caused by viruses.
Selama 50.000-100.000 tahun terakhir, ketika manusia modern meningkat dalam jumlah dan tersebar di seluruh dunia , penyakit menular baru muncul , termasuk yang disebabkan oleh virus.