Abstract

The COVID-19 pandemic originated in Wuhan City, Hubei Province, China in December 2019, and has spread rapidly worldwide as a result of transmission through coughs and sneezes, and the lack of effective vaccines for the prevention of COVID-19. Most infected people experience mild flu-like symptoms, but some become seriously ill, and even die. The level of the available evidence, however, is limited, and the epidemiological behavior of virus transmission is different, and larger and better studies are needed to obtain more reliable data on transmissibility, incubation period, and pathogenicity. Without reliable evidence, it will be difficult to provide recommendations for disease control.