Yes, and sadly, not unpredictable. We knew Sinovac was a discount vaccine from the beginning, and the western hoarding of vaccine production capacity has made it so a lot of countries went to Sinovac (and Sputnik, though the latter seems more protective against Omicron) because it was available, and cheap.Well, that’s unfortunate.Vaccine used in much of the world no match for omicron variant
A new study by researchers at Yale and the Dominican Republic finds the Sinovac vaccine offers little immune protection against the omicron variant.news.yale.edu