参考资料:
[1] Scientists exposed to coronavirus wonder: why weren’t we notified?
[2] Coronavirus cases have dropped sharply in South Korea. What’s the secret to its success?
[3] What China’s coronavirus response can teach the rest of the world
[4] 检测掉链子!美国如何错失了遏制新冠病毒的良机
[5] 特朗普:流感每年死亡36000人!现在你告诉我要停工?你认真的吗?
[6] 外媒:全球战疫,一场美国目前正在输掉的战斗