Assertion: approved vaccine | /r/HasProperty | proved effective
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Source sentences:
text: Favored distribution of vaccines within one or a few select countries, called "vaccine sovereignty", is a criticism of some of the vaccine development partnerships, such as for the AstraZeneca-University of Oxford vaccine candidate, concerning whether there may be prioritized distribution first within the UK and to the "highest bidder" – the United States, which made an advance payment of $1.2 billion to secure 300 million vaccine doses for Americans, even before the AstraZeneca-Oxford vaccine or a Sanofi vaccine is proved safe or effective.