They Relied on Chinese Vaccines. Now They’re Battling Outbreaks.

More than 90 countries are using Covid shots from China. Experts say recent infections in those places should serve as a cautionary tale in the global effort to fight the disease.

Mongolia promised its people a “Covid-free summer.” Bahrain said there would be a “return to normal life.” The tiny island nation of the Seychelles aimed to jump-start its economy. All three put their faith, at least in part, in easily accessible Chinese-made vaccines, which would allow them to roll out ambitious inoculation programs when much of the world was going without. But instead of freedom from the coronavirus, all three countries are now battling a surge in infections.