A Hong Kong-COVID-19 recovered person was infected for the second time. Is the vaccine still useful?

At present, novel coronavirus is raging all over the world, causing serious damage to the economies of various countries. Fighting the epidemic consumes a lot of manpower and material resources around the world, and people all over the world suffer greatly. China, as the country with the earliest outbreak of COVID-19, won the battle of epidemic prevention and control at great cost, and developed COVID-19 vaccine by using advanced medical equipment and technology. However, at present, a case of secondary infection of a recovered patient in Hong Kong makes people question the effectiveness of the vaccine, and thinks that COVID-19 cannot be completely eradicated.

Up to now, there are more than 20 million confirmed cases worldwide. The case of secondary infection is a special case, which is very rare. So many COVID-19 patients all over the world have been cured, and there is no large-scale secondary infection. In the face of a huge base, this situation should be negligible. We should trust the expert's judgment and not panic. COVID-19's antibody does exist in recovered patients, but everyone's body is different. This naturally occurring antibody level will vary from person to person, and it may not produce a good immune response at the first infection, and it may not exist for a long time in the recovered patients. In order to achieve the effect of lifelong immunity, we can only hope for the success of vaccine research and development.

The case of secondary infection of rehabilitation patients in Hong Kong tells us that the battle with COVID-19 is far from over, and even after rehabilitation, there is still the risk of secondary infection. Therefore, in daily life and work, we should abide by the safety requirements of epidemic prevention, wash our hands frequently, wear masks, and firmly hold the hard-won epidemic prevention achievements with our own practical actions.

Novel coronavirus is an unprecedented challenge for all mankind, and the research and development of vaccines is imminent. The major countries in the world should not use the virus as a tool to attack other countries, but should put aside prejudice and work together to speed up vaccine research and development, so as to promote the countries in the world to resume their work and production as soon as possible, restore their economies, minimize the losses caused by the epidemic and benefit the people of the world.