We can't simply say which of these technical directions is better, but we should comprehensively consider its safety, effectiveness, accessibility, affordability and preventive effect on COVID-19. Inactivated vaccine in COVID-19 is an emergency vaccine in China at present. At present, there is only one vaccine, and there is no other choice. And from a global perspective, there is no data to compare the effects of these five vaccines in different directions.
Inactivated vaccine makes the virus lose its infectivity and replication ability by chemical methods. Its advantage is the traditional and classic vaccine preparation method, which is mature and reliable.
At this stage, COVID-19 vaccine is suspended under the following circumstances:
1, less than 18 or more than 59; In fact, COVID-19 is the most harmful to people under the age of 18 and people over 59. This should be arranged in stages, and the experimental data for these people may be in the process of improvement. After some data prove the safety of vaccination for people over 59, there will be no such problem.
2. People who are allergic to any ingredients in the vaccine have had severe allergic reactions to the vaccine in the past, which means that drinking a lot of media in the vaccine is almost the same. If the big vaccine caused allergies in the past, it is not excluded that they will be allergic to COVID-19 vaccine, although the probability is very small.
3, fever, suffering from acute diseases, severe chronic diseases, in the acute attack of chronic diseases. If you have a fever, you should first diagnose what disease is causing it. Some chronic diseases are in an abnormal state when they are in acute attack, so you must not be vaccinated.
4. Pregnant women and lactating women have birth plans within 3 months after vaccination; This is mainly responsible for children, because whether the vaccine has an impact on children requires a lot of data collection.
5. Those who have a history or family history of convulsion, epilepsy, encephalopathy or psychosis; Patients with uncontrolled epilepsy and other progressive neurological diseases, patients with a history of Guillain-Barre syndrome;
6, has been diagnosed with congenital or acquired immunodeficiency, HIV infection, lymphoma, leukemia or other autoimmune diseases;
7. Those who are known or suspected to have serious respiratory diseases, serious cardiovascular diseases, liver and kidney diseases and malignant tumors. People with "three highs", lung problems and cancer patients cannot be vaccinated.
8. Use antineoplastic drugs and other immunomodulators; People with a history of COVID-19 virus infection. Cancer patients are absolutely not allowed to be vaccinated, and there is no data to show whether vaccination will produce immunity to people with a history of COVID-19 infection.