On March 18, the Central Epidemic Command Center (CECC) announced that the global coronavirus disease 2019 (COVID-19) outbreak has continued to expand. There have been more than 1,000 new cases per day in the United States, with four states experiencing community transmission, and more than 100 new cases per day in Canada and Australia, while New Zealand continues to maintain close ties with Australia. The US and Australia have also declared countrywide or regional states of emergency.
