The announcement this week that a cheap, easy-to-make coronavirus vaccine appeared to be up to 90% effective was greeted with jubilation. ¡°Get yourself a vaccaccino,¡± a British tabloid celebrated, noting that the vaccine, developed by AstraZeneca and the University of Oxford, costs less than a cup of coffee.
But since unveiling the preliminary results, AstraZeneca has acknowledged a key mistake in the vaccine dosage received by some study participants, adding to questions about whether the vaccine¡¯s apparently spectacular efficacy will hold up under additional testing.
Scientists and industry experts said the error and a series of other irregularities and omissions in the way AstraZeneca initially disclosed the data have eroded their confidence in the reliability of the results.
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