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AstraZeneca COVID vaccine

How long after second dose of AstraZeneca vaccine, before it is effective?  9/6/21



Concerns about AstraZeneca vaccine: My alarm was raised when I first understood from Anne de Gheest's 2nd April 2021 that the AstraZeneca vaccine was not very effective against the South African and the Brazilian variants of COVID. So this page seeks to monitor developments in "that space".

Slide from Anne de Gheest's Clinical presentation 30/Apr/2021. Note the line: "AstraZeneca is ineffective with B.1.351".  Based on the scientific research, Anne de Gheest concludes:


Slides from Anne de Gheest's Clinical presentation 16/Apr/2021


28/May/21 Anne de Gheest COVID Clinical update  

  • Europe is trialling this because of the high use of AstraZeneca in Europe.


New data show vaccines reduce severe COVID-19 in older adults  1/Mar/2021 Public Health England

  • In the over 80s, data suggest that a single dose of either vaccine (Pfizer or AstraZeneca) is more than 80% effective at preventing hospitalisation, around 3 to 4 weeks after the jab. There is also evidence for the Pfizer vaccine, which suggests it leads to an 83% reduction in deaths from COVID-19.

  • The data also shows symptomatic infections in over 70s decreasing from around 3 weeks after one dose of both vaccines.

  • The new analysis adds to growing evidence that the vaccines are working and are highly effective in protecting people against severe illness, hospitalisation and death.

  • “It is important to remember that protection is not complete"

  • BB comment:  I had been looking for some supporting evidence of these claims. While this article is not as precise and as complete as I would like, it is a good start.

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