In 2003 after the SARS epidemic, Beijing enacted a formal crisis-management system with new laws, committees and a series of national, departmental and special-situation contingency plans.
It is too expensive for farmers to use routinely, and since it is not effective until a month after vaccination, administering it after an outbreak begins helps very little.
3
新冠疫情爆发后,她突然失去了工作。
After the outbreak (爆发) of COVID-19, she suddenly lost her job.