Emerging Diseases as A Challenge for EpidemiologicalTransition in This Global Village

This commentary provides a quick overview to 2019 novel coronavirus (COVID-19) and other emerging viruses in recent decades. All the evidence related to emerging infections suggests that we are faced with unknown threats and challenges in the epidemiological and heath transition. The coronaviruses already identified such as severe acute respiratory syndrome coronavirus (SARS-COV), Middle East respiratory syndrome coronavirus (MERS-COV), and nowadays COVID-19, may only be the tips of the icebergs, and probably more novel and severe emerging infections might be revealed in the near future in the humans’ communities.