Recently, the situation of the new coronavirus pneumonia epidemic in China is continuing to improve, and according to the latest report on February 27, academician Zhong Nanshan predicted that the epidemic will be basically controlled at the end of April, according to the previous prediction model, the peak of the epidemic will be in mid-February near the end of February, in February 15 the data related to the epidemic has started to decline, and now the reality is basically consistent with the prediction. Although the domestic epidemic is now under initial control, the epidemic has never reached the end of the day, and more importantly, many countries abroad have recently seen patients with neocoronavirus pneumonia emerge one after another, and the spread is quite rapid. In history, there have been infectious diseases such as the Black Death, plague and smallpox that had a relatively large impact and spread widely, and the casualties caused by these large plagues were incalculable. Of course, in today’s era of relatively advanced medical technology, we believe there is enough strength to quickly resolve this new crown virus. For now, we also cannot passively rely on preventive and control measures to solve it, but also need to hope for a vaccine. What is a vaccine? Smallpox, the first infectious disease in human history to be eradicated by humans, was the first “vaccine” invented by humans, using a vaccine. Based on this experience, scientists have invented vaccines for rabies, tuberculosis, hepatitis A and other infectious diseases. The body’s own immune system is the most powerful weapon against disease. In fact, our body’s immune system fights all kinds of bacteria every day and is invincible. However, the immune system is not perfect and can fail to fight viruses it has never seen before due to lack of “battle experience”, which is why this new coronavirus is so deadly. The role of the vaccine can be understood as a way for the body’s immune system to practice how to fight the virus in advance, to produce antibodies to the disease. When the virus really invades, it can also successfully cope with it and provide a good preventive effect against the disease. Therefore, if a vaccine for the new coronavirus can be successfully developed, the epidemic can be ended. Is there a difference in the effectiveness of vaccination for healthy people and obese people? As mentioned earlier, the human immune system is not perfect, and vaccination as a means of boosting the human immune system is not infallible. The effectiveness of vaccines in preventing diseases is also related to the body type of the vaccine recipient. It is well known that obese people have a weaker heart and lung function and resistance compared to the general population. Scientists at the University of North Carolina found that among people who received the flu vaccine, those who were obese were almost twice as likely to develop the flu as those of normal weight. In the study, 10 percent of obese people contracted the flu virus despite vaccination, compared to only 5 percent of people of normal weight who contracted the flu virus. Although obese people who are vaccinated have limited resistance to the disease, there is no need to worry too much because the vaccine works to prevent the disease, but also to reduce the damage that the disease can cause to the body. That is to say, if you are vaccinated against the new coronavirus, in case you still contract the new coronavirus pneumonia, the relative treatment will not be as difficult as it is now. Of course, we continue to emphasize that the body’s immune system is the most powerful weapon in the fight against the disease, so it is best for obese people to be able to lose weight in time. We all know that obesity is a huge health risk, so losing weight is also a way to improve immunity.