One: COVID-19, an American infectious disease expert, died. According to relevant media reports, an American Indian infectious disease expert named Kapila returned to India at the end of March to take care of his elderly father-in-law, but unfortunately he was infected with the mutated COVID-19 in India, and was hospitalized and died soon after. What attracted the attention of the outside world was that the infectious disease expert had completed two doses of COVID-19 vaccine injections at Pfizer before returning to India. However, Pfizer vaccine is famous for its high efficiency. The effective rate can reach 90% after one dose and 95% after two doses. Although the protection rate of COVID-19 vaccine can't reach 100%, the protection rate of two doses of Pfizer vaccine in COVID-19 should reach 100%. Under normal circumstances, there will be no serious death.
Second, the causes of infection and death after vaccination with COVID-19 vaccine. The American infectious disease expert was infected with COVID-19 virus and died after two doses of Pfizer vaccine. The reasons may be as follows: first, after COVID-19 vaccine is inoculated, it will take some time for the vaccine to produce enough antibodies in the body, and there is still the risk of COVID-19 infection during this period; Secondly, Pfizer vaccine adopts mRNA technology, which is really effective for common COVID-19, but the effect is obviously reduced when it is used for mutating virus. MRNA technology can be regarded as a key, but it can only deal with ordinary COVID-19? Lock? , for COVID-19 this variant? Lock? It may not be effective, but COVID-19 is? Double mutation? Variation, compared with ordinary COVID-19, the degree of variation is greater, further reducing the effectiveness of the vaccine. Third, there may be ADE effect, that is, antibody dependence is enhanced, and antibodies will react during virus infection, not only helping the virus, but also helping it? Attack? Thereby accelerating the onset of the disease.
Third: COVID-19 vaccine is still effective. Vaccination with COVID-19 vaccine is still the most effective and economical means to prevent COVID-19 infection. When the vaccination rate in COVID-19 reaches more than 70%, a group immune barrier can be constructed, which can effectively prevent the occurrence of group infection in COVID-19. Only by reducing the number of infected people in COVID-19 can we effectively control the development trend of COVID-19 epidemic and further inhibit the variation of COVID-19, especially the whole virus inactivated vaccine can still neutralize the variation of COVID-19. Therefore, we should complete the vaccination of COVID-19 vaccine as soon as possible before the essential mutation occurs in COVID-19.