Keywords : COVID-19 ; vaccine
Introduction:
the face of new global spread of the virus crown on Its vaccine development has adopted a series of unconventional policies. Especially the mRNA vaccine is the first vaccine developed in human history. The long-term efficacy and side effects of have been worrying.
In addition, the new coronavirus continues to mutate. Whether the new coronavirus vaccine is effective against the mutant strain is also the most concerned issue.
April 1, 2021 _strong5br
April 1, 2021 _strong5B_2strong2Pfray company 1span5strong24,000 years old and over 162 years of vaccinations Results of a 6-month follow-up study,Answered the above question.
This research report is a milestone, and once it was released, it immediately attracted widespread media attention.
By analyzing 927 infected cases, the analysis indicated that 2_strong_strong_strong_strong_strong_span5 was 6 months after vaccination.
has 100% (CDC standard) or 95.3% (FDA standard) protection against severe illness .
BNT162b2 in B.1.351 mutant strain South Africa recruited 800 volunteers, 9 cases of COVID-19 were observed in the placebo group, 6 of which were infected with B.1.351 mutant strain ; Shows that is in South Africa where the B.1.351 mutant strain is prevalent, and Pfizer vaccine has 100% protection against COVID-19 .
But it should be noted that the sample size of the South African study is small,This result needs to be treated with caution.
Within six months after the second administration, no serious safety hazards were observed ; the side effects observed are consistent with the previously reported results.
Summary:
Pfizer mRNA vaccination 6 months after the good safety and effectiveness of the observation results have further proved the safety and effectiveness of the vaccine.
The results of the study will be published soon, and Pfizer is also preparing to submit a biologics license application to the US FDA accordingly.
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span1, strong 111spans2 reaction .
The company has declared EUA to the FDA.
and clinical trials of children from 6 months old to 11 years old are also being carried out .
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