One of them is that bad it seems, specifically CoronaVac used in Chile. Note that Chile is one of the countries with highest percentage vaccinated - and there are still high number of new cases daily.
There are at least three Chinese inactivated virus-vaccine and one viral vector one.
Two inactivated are made by Sinopharm (BBIBP-CorV and something), and some claim they are about 72%-78% effective -
https://jamanetwork.com/journals/jam...rticle/2780562
And another by Sinovac (CoronaVac) - which some claim is 51% and others 80%.
The viral vector (similar as AstraZeneca, Janssen (or J&J), Sputnik V) is similarly as Janssen a single-dose one made by CanSino called AD5-nCOV or Convidecia; and about 66% effective (similarly as Janssen).
It seems all Chinese pharma-companies must have "sino" in their name.
Additionally, one major new issue is that they might protect less well against all of the variants - and especially viral vector ones have that problem, whereas mRNA seems handle variants better. We don't know about the inactivated viruses yet, but that may explain some low numbers in practice.
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The problem with viral vectors like Sputnik V, AstraZeneca, Janssen is that they are not ideal for a yearly shot - you might get a reaction to the "adeno-vector" instead of the corona-virus - so unfortunately that will not work well. But it's unclear if poorer countries will bother with that.
Sinovac's Coronavac is inactivated so it doesn't have that issue, which is a major benefit.