Emergency response to public health incidents is part of the emergency management system for emergencies. Since 2003, this system has been gradually improved, and in this epidemic response, whether the emergency plan has effectively played a role is also a question worthy of reflection.

Stones from other hills may serve to polish the jade of this one. The more mature emergency systems of some countries may be used as mirrors to examine themselves from the perspectives of trigger mechanism, coordination and linkage, and plan execution. Is the hierarchical definition design of public health emergencies too broad and lacks operability? Are there any flaws in the design of the trigger mechanism of the plan, leading to uncertain timing of action? How do different levels participate in the response, and are the boundaries clear? Are there any redundant designs?

Expanded, information communication, big data applications, official and private interactions, and public health emergency supplies are all areas that need to be discussed.

When an infectious disease broke out, it brought an unfamiliar virus. Therefore, when responding to the pandemic, we must not only "know the enemy", understand the structure and infection mechanism of the new coronavirus, but also "know ourselves" and understand how the human body's immune response and protection mechanisms work.

In accordance with these knowledge bases, a more scientific guidance for clinical diagnosis and treatment can be established, while potentially effective drugs can be screened. At present, drugs and therapies for the new coronavirus are emerging in an endless stream. Only by identifying the effect of drugs and relying on solid clinical trials can they truly obtain safe and efficacious clinical applications.

Compared with disasters such as earthquakes and fires, the epidemic of infectious diseases appears more silent and intangible, but we can still use some knowledge and scientific tools to interpret it. In many studies on epidemic prediction and analysis, R0 is a major protagonist, and it is an important parameter to measure the infectiousness of a disease. The analysis of the natural history of the disease can clarify the behavior of the pathogen and the timeline of the development of the host disease, of which the "pre-symptomatic transmission" is particularly important. 

With a ruler describing infectious diseases, we will know more about how to take targeted prevention and control measures. For example, by monitoring cases or isolating susceptible groups to reduce the rate of person-to-person contact. If effective antiviral drugs can be found, it can also help shorten the course of the disease. If an effective vaccine can be developed, susceptible people can have better immune protection and prevent the spread of the virus. Different infectious diseases have different characteristics, and measures need to be weighed against the pros and cons. In the early stages of infectious diseases, many factors are unknown. We need to be patient and be vigilant about any assertions about the situation. 

In addition, understanding the genomics of the virus can unfold more information for us, knowing who it is, where it comes from, and whether it has mutated, and rudimentary conspiracy theories have nowhere to hide.

In mid-December 2019, a short-term case of unexplained pneumonia with fever, fatigue, cough, and shortness of breath appeared in Wuhan, China. After just over a month, people had not had time to react to this new type of pneumonia, the coronavirus has quickly swept across China.

From the beginning of the epidemic to the public panic, we are faced with a huge amount of information every day, and look forward to understanding the pandemic in a  more rational, rigorous attitude. Thinking of this, we decided to invite 6 graduate students/doctoral students from various Harvard University to popularize the new coronavirus with  their professional knowledge and perspectives for the audiences..

The pandemic affects almost everyone. Different groups of people, such as confirmed patients, suspected patients, family members, home quarantine, and medical staff, may have different psychological reactions. The pandemic may induce many mental symptoms, including anxiety, depression, obsessive-compulsiveness, hypochondria, and somatization.

These reactions are normal and reasonable, please be patient and take time to accept your emotions. You can try to draw, write diaries, chat with family and friends, and vent the depressed emotions in your chest; cry if you want, this is also a good way to express negative emotions healthily. Please do not forget to arrange some exercises for yourself, keep exercising and do simple abdominal breathing to calm down.

In addition, adults who can maintain a stable mood will bring their children a sense of security. Parents can also communicate with children through telling stories, reading picture books, etc., to help them recognize, express, and accept their emotions.

Warm yourself, you can also illuminate people around you.