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Thank you for the links. I followed them and came to a different conclusion: 1) "The vaccination rate of a country is not correlated with its covid infection r

Thank you for the links. I followed them and came to a different conclusion: 1) "The vaccination rate of a country is not correlated with its covid infection rate". From the article: "The lack of a meaningful association between percentage population fully vaccinated and new COVID-19 cases is further exemplified, for instance, by comparison of Iceland and Portugal. Both countries have over 75% of their population fully vaccinated and have more COVID-19 cases per 1 million people than countries such as Vietnam and South Africa that have around 10% of their population fully vaccinated." You can interpret this as either the vaccine not working (unlikely) or that high-income countries such as Iceland and Portugal test a larger share of their population than low-income countries such as Vietnam and South Africa (very likely), thus confounding the relationship between vaccination levels and reported Covid cases. 2) "And after 3 months of being fully vaccinated, people are just as likely to spread the virus as unvaccinated people". From the article: "The risk of spreading the Delta infection soon after vaccination with that jab [Pfizer] was 42%, but increased to 58% with time." Your quote shows that the AstraZeneca vaccine loses effectiveness over time. However, the chance of an unvaccinated person passing on the virus is 67%, which is significantly higher than the 58% for a person who received the Pfizer vaccine.

icelancer 5y ago
"Your quote shows that the AstraZeneca vaccine loses effectiveness over time. However, the chance of an unvaccinated person passing on the virus is 67%, which is significantly higher than the 58% for a person who received the Pfizer vaccine." The word "significantly" has a specific statistical meaning. The paper discussed on the Nature article implies it is not a statistically significant difference between 67% and 58% (likely accounting for covariance and measurement error). Unless you have a different source showing there is statistical significance between those two results?
ggdG 5y ago
> You can interpret this as either the vaccine not working (unlikely) or that high-income countries such as Iceland and Portugal test a larger share of their population than low-income countries such as Vietnam and South Africa (very likely) You may interpret all you want, but I was just pointing out the lack of solid data supporting the claim: "The vaccine significantly slows the spread" Almost 3 billion people have been fully vaccinated worldwide and yet there is still no evidence that the vaccines have any effect at all in slowing the spread of the virus. I find this rather remarkable. This situation could very well push the evolution of the virus towards more dangerous strains. Like what happened with Marek's disease among chickens: https://www.quantamagazine.org/how-vaccines-can-drive-pathogens-to-evolve-20180510/ https://www.quantamagazine.org/how-vaccines-can-drive-pathog... > Your quote shows that the AstraZeneca vaccine loses effectiveness over time. However, the chance of an unvaccinated person passing on the virus is 67%, which is significantly higher than the 58% for a person who received the Pfizer vaccine. Pfizer buys you a bit more time, but the downward trend in your immunity is unmistakable too: https://www.i24news.tv/en/news/coronavirus/1626980447-vaccine-39-effective-at-halting-virus-transmission-91-against-serious-illness-israel-s-health-ministry-says https://www.i24news.tv/en/news/coronavirus/1626980447-vaccin... https://imgur.com/zt0wrOo https://imgur.com/zt0wrOo https://www.gov.il/BlobFolder/reports/vaccine-efficacy-safety-follow-up-committee/he/files_publications_corona_two-dose-vaccination-data.pdf https://www.gov.il/BlobFolder/reports/vaccine-efficacy-safet...

icelancer 5y ago

"Your quote shows that the AstraZeneca vaccine loses effectiveness over time. However, the chance of an unvaccinated person passing on the virus is 67%, which is significantly higher than the 58% for a person who received the Pfizer vaccine." The word "significantly" has a specific statistical meaning. The paper discussed on the Nature article implies it is not a statistically significant difference between 67% and 58% (likely accounting for covariance and measurement error). Unless you have a different source showing there is statistical significance between those two results?

ggdG 5y ago

> You can interpret this as either the vaccine not working (unlikely) or that high-income countries such as Iceland and Portugal test a larger share of their population than low-income countries such as Vietnam and South Africa (very likely) You may interpret all you want, but I was just pointing out the lack of solid data supporting the claim: "The vaccine significantly slows the spread" Almost 3 billion people have been fully vaccinated worldwide and yet there is still no evidence that the vaccines have any effect at all in slowing the spread of the virus. I find this rather remarkable. This situation could very well push the evolution of the virus towards more dangerous strains. Like what happened with Marek's disease among chickens: https://www.quantamagazine.org/how-vaccines-can-drive-pathogens-to-evolve-20180510/ https://www.quantamagazine.org/how-vaccines-can-drive-pathog... > Your quote shows that the AstraZeneca vaccine loses effectiveness over time. However, the chance of an unvaccinated person passing on the virus is 67%, which is significantly higher than the 58% for a person who received the Pfizer vaccine. Pfizer buys you a bit more time, but the downward trend in your immunity is unmistakable too: https://www.i24news.tv/en/news/coronavirus/1626980447-vaccine-39-effective-at-halting-virus-transmission-91-against-serious-illness-israel-s-health-ministry-says https://www.i24news.tv/en/news/coronavirus/1626980447-vaccin... https://imgur.com/zt0wrOo https://imgur.com/zt0wrOo https://www.gov.il/BlobFolder/reports/vaccine-efficacy-safety-follow-up-committee/he/files_publications_corona_two-dose-vaccination-data.pdf https://www.gov.il/BlobFolder/reports/vaccine-efficacy-safet...