Brazil could soon face shortages of a Chinese coronavirus vaccine due to delays in the export of key ingredients, and local politicians are concerned that strained ties with Beijing may be a factor holding up shipments.CoronaVac, produced by Sinovac Biotech Ltd, won approval for emergency use from Brazil’s health regulator Anvisa on Sunday. The first health professionals were vaccinated on Monday in the state of São Paulo, making CoronaVac the first and for now only vaccine available in the…

This post was originally published on South China Morning Post.