The abbreviation for New Crown is COVID-19. New Crown, known as Novel Coronavirus Pneumonia, is known in English as Corona Virus Disease 2019, abbreviated as COVID-19. On February 11, 2020, the World Health Organization announced that the new coronavirus infected pneumonia named “COVID-19”. On February 22 of the same year, China’s National Health Commission issued a notice revising the English name of “novel coronavirus pneumonia” to “COVID-19”. New coronavirus pneumonia is caused by a new coronavirus infection with an incubation period of 1 to 14 days, mostly 3 to 7 days. Fever, dry cough and malaise are the main manifestations, and some patients may have nasal congestion, runny nose and diarrhea. Severe patients mostly develop respiratory distress and/or hypoxemia one week after the onset of the disease, and in severe cases, the disease may rapidly progress to acute respiratory distress syndrome, sepsis, and shock. In times of epidemics, good personal protection and self-health monitoring, and early vaccination with the New Crown Vaccine without contraindications is the greatest contribution we as ordinary citizens can make to the epidemic. Tip: “New coronavirus pneumonia” and “new coronavirus pneumonia” mentioned in this article have been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.