1. Academician Zhong Nanshan's statement is aimed at the confrontation between human body and COVID-19. Academician Zhong Nanshan once said that there are two reasons, namely, the number, virulence and human immunity of pathogens, whether human beings will get sick and the severity of diseases.

From this passage, we can know that whether COVID-19 has sequelae after infection depends on the toxicity of COVID-19 and human immunity.

2. At the initial stage of the COVID-19 epidemic, after COVID-19 was infected, there was a greater possibility of sequelae. First, look at the mortality data of different strains in COVID-19 given by the World Health Organization: the mortality of the original strain in COVID-19 is about 65,438 0.7%, that of the variant strain Delta is about 65,438 0.5%, and that of the variant strain Omicron is about 0.65,438 0.4%. What do we see and think from these data?

1. Both the original strain and the mutant strain Delta have strong toxicity, but the toxicity gradually weakens after the virus continues to mutate.

2. COVID-19 vaccine has played a great role in preventing and reducing the harm of COVID-19. Let's think about it. Why did the toxicity of COVID-19 mutant Omicron decrease so much? The main reason is that many of us have been vaccinated with COVID-19 vaccine.

3. The possibility of sequela is relatively high if it is infected by original strain and mutant strain Delta, and relatively low if it is infected by mutant strain Omicron.

4. The increase in the proportion of asymptomatic virus-infected people also shows the above contents, and it also shows that asymptomatic virus-infected people are less likely to have sequelae.

3. People with weak immunity are more likely to leave sequelae after being infected with COVID-19 virus. The following are some football stars infected with COVID-19: Messi, Cristiano Ronaldo, Neymar, Mbappé, De Braune, Dibala, Ibrahimovic and Leo. Among them, C Ronaldo was "twice recruited".

Aren't these football stars still galloping in the shade? Yes, COVID-19 did them no harm, hardly. The reason is that their immunity is far stronger than that of ordinary people. So, how can we enhance the immunity of the body?

Vaccination with COVID-19 vaccine is an active immunization and an effective way to prevent COVID-19 from invading, as mentioned above. We should also pay attention to strengthening the body's immunity through physical exercise, balanced diet and nutrition, combining work and rest, and maintaining a good attitude.

As the saying goes, people are not angry. Not only COVID-19, but all viruses bully the weak and fear the strong. Therefore, people with poor immunity, especially the old and weak groups, should pay more attention to the enhancement of immunity while doing a good job of self-protection.

In any case, we should protect ourselves and avoid COVID-19's infection. The harm that COVID-19 has brought us is inevitable, but it is only small and big. Therefore, it is necessary to take preventive measures such as wearing masks and enhancing immunity. Only by avoiding COVID-19 infection, our health and our life can we avoid the "sequela" that COVID-19 may bring.