armchairlawyer wrote: ↑Mon Apr 19, 2021 8:14 am Dr John Campbell reported yesterday on Chile. It is the third best vaccine performer amongst sizeable countries (after Israel, UK) but has not so far enjoyed the same reduction in the number of Covid cases. There are several possible reasons for this and one of them is that they mostly used Sinovac's Coronavac vaccine (87% and the rest was Pfeizer). Chile has a good healthcare system and they were able to collate statistics on vaccines and cases over a two month period. The second Coronavac dose was given 28 days after the first one.

Looking at people two weeks after the second dose (this data includes all vaccines and that did include a small proportion of Pfeizer):
Symptomatic disease was down 67%
Deaths down 80%
Hospitalisations down 85%
ICU admissions down 89%.

So, the good doctor concludes that this real world data based on over 1 million people who had the vaccines and a control group of many more millions shows us that Coronavac (as it is correctly called btw) is not very effective after one dose but it is pretty damn good two weeks after the second dose (where that second dose was given 28 days after the first one). However, it is worth noting that Chile followed best practice by giving vaccines in descending age order.


Chile coverage begins at 12:30

ExPenhMan wrote: ↑Mon Apr 19, 2021 11:52 am ^^^ Very strange indeed. But I could not dig up a single reference to the 49 per million blood clot cases among mRNA vaccine receivers.

As for the Coronavac, those are pretty good numbers, indeed. It does what vaccines are supposed to do, reduce the impact of an infection, both on the person and hospital services. Are the Chinese playing a worldwide game? We all know about its vaccine diplomacy initiative. But to distribute the vaccine to other countries to test seems a rash and risky attempt in one-upmanship on the west. Fortunately for them, it seems to be working in their favour, thanks to the Chileans.

Unlike nations that are extending the gap between first and second doses to get more people some protection, [Health Minister Enrique] Paris said Chile is now prioritizing second doses over firsts. The country aims to administer 760,000 second shots this week because of data showing a single dose of the Sinovac shot provides little protection.

Chile published its own analysis of the limited efficacy of Sinovac's CoronaVac vaccine on its population last week. The shot was only 16% effective in preventing infection and 36% effective at keeping people out of the hospital after one dose.

"If we don't administer the second dose, the situation could be much worse," Paris said.

ExPenhMan wrote: ↑Thu Apr 22, 2021 10:46 am

ExPenhMan wrote: ↑Mon Apr 19, 2021 11:52 am ^^^ Very strange indeed. But I could not dig up a single reference to the 49 per million blood clot cases among mRNA vaccine receivers.

As for the Coronavac, those are pretty good numbers, indeed. It does what vaccines are supposed to do, reduce the impact of an infection, both on the person and hospital services. Are the Chinese playing a worldwide game? We all know about its vaccine diplomacy initiative. But to distribute the vaccine to other countries to test seems a rash and risky attempt in one-upmanship on the west. Fortunately for them, it seems to be working in their favour, thanks to the Chileans.

Well, I take some of that back. Currently, Chile is being crushed by another wave, which includes variants of concern, with a sizeable segment of the population having had only one vaccine dose. This fresh little morsel of info on Coronavac shows it is woefully inadequate after a first dose.

Unlike nations that are extending the gap between first and second doses to get more people some protection, [Health Minister Enrique] Paris said Chile is now prioritizing second doses over firsts. The country aims to administer 760,000 second shots this week because of data showing a single dose of the Sinovac shot provides little protection.

Chile published its own analysis of the limited efficacy of Sinovac's CoronaVac vaccine on its population last week. The shot was only 16% effective in preventing infection and 36% effective at keeping people out of the hospital after one dose.

"If we don't administer the second dose, the situation could be much worse," Paris said.

https://www.reuters.com/world/americas/ ... 021-04-21/

Figures have revealed that out of the 74,405 coronavirus patients admitted to hospital between last September and this March, just 32 of them had been jabbed.