What links these countries is that they have each fully inoculated more than 50% of their populations, largely with Chinese-made coronavirus vaccines. And that's raised questions over the vaccines' efficacy.
If the Chinese vaccines aren't working, that's a huge problem -- and not just from a health perspective. Beijing has staked its reputation on providing other countries with vaccines. As Western nations stockpiled supplies for their own populations, China sent vaccines overseas -- in June, the foreign ministry announced the country had delivered more than 350 million Covid-19 vaccine doses to more than 80 countries. That mission highlighted inadequate Western efforts at a time when tensions between China and many major democracies were running high.