Quote from: LTU_btc on May 05, 2021, 08:35:02 PM

Quote from: bryant.coleman on May 03, 2021, 11:27:52 AM

Sinovac vaccine has a single-dose efficiency of just 3%, according to a study performed by Universidad de Chile.

3%? Did I read it right? Shouldn't it something like 30%? I tried to look for more data about this vaccine and there is lot of different numbers. From what I found, efficiency of Sinovac vaccine is between 50% and 78% according to different researches.

Single dose efficiency of the Sinovac vaccine is 3%. The details are here:
https://qz.com/2018838/what-we-know-about-efficacy-of-sinopharm-sinovac-vaccines/

Quote

An April study from the University of Chile put the effectiveness of a single dose of Covid-19 vaccine at 3% for protecting against symptomatic infection, based on an examination of seven million vaccinated people.

Link from the journal article here: https://www.uchile.cl/noticias/174186/resultados-primer-estudio-de-efectividad-de-las-vacunas-en-chile

The efficacy after two doses of Sinovac was measured at 54% during the same study. Now compared to this, the one-dose efficacy is 61% for AstraZeneca, 92% for Pfizer, 79% for Sputnik V and 66% for Janssen.

Quote from: UmerIdrees on July 07, 2021, 06:53:57 PM

Quote from: bryant.coleman on May 04, 2021, 11:38:20 AM

If your Pfizer vaccine was available to everyone, then there was no need for us to take Sputnik V, right? The problem is that Pfizer has restricted their sales to rich countries, where they can sell their vaccine for $75 per individual. When Brazil and Argentina asked them for the supplies, Pfizer wanted the army bases and gold reserves of these countries as collateral in returns for the medicines. On the other hand, Russia provided a lot of poor nations with the Sputnik V vaccine. And the efficacy as per The Lancet is 92%, compared to 95% for the Pfizer vaccine.

That's not the case anymore. I think USA has ample Pfizer vaccine now and they are sending it to underdeveloped countries. I am from Pakistan and we have also receive a good quantity of Pfizer vaccine.
Pakistan to receive 13m Pfizer vaccines

Pakistan may receive Pfizer doses starting from Q4 2021. The vast majority of these doses will be delivered in 2022 and 2023. Most of the countries are not ready to wait for that long, and that is why they are going for other vaccines.